列治文华人刚买的船变废铁要退货 卖家喊冤：你颠倒黑白不知感恩

T_N_T

01234 发表于 2023-11-18 13:28
双方都有撒谎吧！只要2万多就能买船可能吗？

旧船本来就不会太贵。但那个修理工说的如果是真实情况的话，显然买家是完全不懂船，自己把船弄坏的。比如说没有把船体上放水的塞子打开，那雨中肯定变澡盆。另外，船的引擎是必须在水中才能启动的，因为需要抽水来冷却引擎，这跟汽车引擎用冷却液冷却是完全不一样的。

APP用户__fL15oc

肯定是老外在行骗，加拿大的华人要不是被逼急了，有哪个会去走法律程序。

幻@露

炒家 发表于 2023-11-18 15:50
修理工做好人，最後變成法庭上的罪人，真可憐。

这你都相信，你会为完全不认识的人免费服务，而且还上门服务这么多次？反正我是不信

MarkWei

2万多就买一艘旧的豪华游船，你还能指望它什么，要买就买一艘新船，加拿大人工这么贵，自己不会修船还去买旧船，这个华人是不是脑子进水了。

david8282

土豆小丑下台吧 发表于 2023-11-19 03:04
笑掉大牙了这位。不懂就算了，还装得挺懂的。哈哈哈。

大牙如果真能笑掉，那真是帮了我的大忙了，两颗智齿需要拔掉，省了一笔银子了哦。

我已经在网上搜索了一些链接，一起学习。

触类旁通，举一反三，避免出现主题里或者类似的事情。

david8282

完善自我 发表于 2023-11-19 00:05
看来你是真不懂船哪，船的发动机就是靠湖水或海水冷却的

我的确没接触过船，是思考的。

david8282

yang在水一方 发表于 2023-11-18 22:37
你考个船牌先，然后你就知道你的高见有多么荒唐， 真是只要自己绷的住那根筯， 尴尬的是别人 ...

我没有船牌，只是思考的。

david8282

yang在水一方 发表于 2023-11-18 22:37
你考个船牌先，然后你就知道你的高见有多么荒唐， 真是只要自己绷的住那根筯， 尴尬的是别人 ...

https://www.marine-power.net/how-it-works.html

How it works?

Heat Exchanger and Marine Cooling Systems

Marine engines, as well as automotive engines are, cooled by circulating water through the engine block. Marine engines are unique in that there are two different types of cooling systems. The standard raw water system, and the fresh water (commonly known as the closed) cooling system.

Raw Water Cooling Systems

Raw water cooling systems draw water from outside the boat (seawater or lake water). Water is pumped from the source to the engine block then the engine circulation pump forces the raw water through the engine block and the water is expelled through the exhaust. Raw water cooling systems are relatively simple and the standard cooling system on most Marine Engines. The raw water pump in most cases is inside the outdrive. On larger engines and inboard engines the raw water pump is located inside the boat and is driven by a v-belt or directly off of the crankshaft. The danger is using salt water as a coolant in your engine. Salt water can be highly corrosive. Running salt water through your engine block and exhaust manifolds will lead to destructive corrosion that is unseen until your engine or exhaust manifolds fail.

Generally speaking, marine engines cooled with raw water, especially ones that use salt water, have a shorter life span than marine engines cooled with a closed cooling system.

Fresh Water Systems Heat Exchanger and Keel Cooled systems

Fresh water cooling systems, also known as a closed cooling systems, come in several varieties. The most common type utilises a Heat Exchanger which functions similarly to the radiator in your car. Coolant (antifreeze) is circulated through one side of the heat exchanger where it is cooled by raw water that passes through the other side of the heat exchanger. The engine coolant is then circulated back into the engine. The raw water is expelled out of the boat through the exhaust. Another common type of closed cooling systems is known as a Keel Cooler. This is done by eliminating the use of a heat exchanger. Instead of pumping raw water into the vessel’s heat exchanger where it cools the coolant, the coolant is pumped through pipes or aluminium extrusions on the outside of the hull where the surrounding water (lake, river or sea water) cools the coolant before it is pumped back into the engine. The use of keel coolers removes the need for a heat exchanger, raw water pump and the other components necessary for pumping raw water into the heat exchanger.

Closed cooling systems are more complex than raw water cooling systems, but have distinct advantages:

Minimal internal engine corrosion.

More effective at cooling the engine and allows you to run your engine at higher temperatures, resulting in better engine performance and fuel economy.

How A Heat Exchanger Functions

A heat exchanger transfers, or “exchanges,” heat from your boat engine’s coolant to raw water pumped from the water outside of your boat. The raw water is pumped through a bundle of small tubes in a chamber filled with the hot engine coolant. The tubes are cooled by the colder raw water the allowing the tubes to absorb the heat of the engine coolant.
To function correctly, a heat exchanger must be carefully matched to your boat’s engine.

Expansion Tanks

Expansion tanks are an often overlooked but very important part of a closed cooling system. As the engine coolant gets hot it expands, increasing in volume. The expansion tank is a small tank that simply provides room for this increase in volume. In some systems, the heat exchanger is a piggy back style. This is when the expansion tank is built on top of the Heat Exchanger. On some Heat Exchanger systems, the expansion tank is a separate tank remotely mounted. Another important component to the heat exchanger is the cap on expansion tank similar to the cap on your cars radiator. It is an important component in, maintaining your cooling system’s pressure. It should, be checked regularly for leakage and corrosion. We recommend that you replace the cap on your expansion tank every two years.

david8282

完善自我 发表于 2023-11-19 00:05
看来你是真不懂船哪，船的发动机就是靠湖水或海水冷却的

https://boatingfreedom.com/under ... sanitation-systems/

NDERSTANDING ANTIFREEZE – WINTERIZING YOUR BOAT’S ENGINE, GENERATOR, POTABLE WATER, AND SANITATION SYSTEMS.
3RD NOVEMBER 2021

Those of us who live in the northern latitudes rely on antifreeze to protect our boat’s engines, and generators with closed cooling systems, hydronic heating systems, onboard sanitation, and potable water systems. As widely used as antifreeze is it’s one of the least understood tools we use, mainly because the widely accepted standard used to establish its rating can be dangerously misleading.




Antifreeze used in an engine’s coolant system serves many purposes. The most important is keeping the coolant in your engine from freezing during cold temps. It also keeps that same fluid from boiling over during the summer by elevating the boiling point of the fluid. Systems are normally filled with a 50/50 mixture of antifreeze and water. Other functions of antifreeze are lubrication and corrosion inhibitor.

There are two types of antifreeze in general. Ethylene glycol is recommended by many engine manufactures for use in closed cooling systems, but it’s quite toxic, so precautions must be taken to use and dispose of it carefully. It has a yellow-green color and tastes sweet, making it attractive to children and pets if stored improperly or spilled on the ground. Propylene glycol (pink in color) is used to protect boat and RV pumping systems and is advertised as nontoxic and environmentally friendly, but it still should be thoroughly flushed from potable water systems before they are used.

The common ready-to-use antifreeze available on the market for potable water systems is contains about 30 percent propylene glycol and is rated to provide protection to -50 degrees Fahrenheit, equivalent to -45.5 degrees Celsius. The balance of the solution is mainly water with additives to lubricate pumps and seals, and algae inhibitor.

Many skippers assume the rating means -50 degrees antifreeze will remain in a liquid state until its temperature reaches 50 below zero, but that is far from reality. The slush point, where ice crystals begin to form in the solution, is around 12 degrees Fahrenheit (-11 degrees Celsius), more than 60 degrees Fahrenheit (15.5 degrees Celsius) above its nominal rating. At that point, damage is not imminent, but as the temperature of the solution drops, more dense crystals begin to form, expanding to exert increasing pressure on the wall of the pipe, water channel or container until it reaches it burst point. In accordance with standard rating system, means that the antifreeze will not cause a copper pipe to burst until it reaches that temperature. It’s important to recognize that the -50 rating indicates the temperature at which the product can fail to protect. Unfortunately, when the same solution is used to protect a system with PVC pipe or fittings it can cause the plastic to burst at -10 degrees Fahrenheit (-23 degrees Celsius). A plastic reservoir would fail even sooner.

In areas where the temperature at its extreme low could reach the bursting point of any part of the water system it’s recommended the added protection of an antifreeze that is rated for much lower temperatures. A pure or ready-to-use (undiluted antifreeze solution that is rated at -100 degrees Fahrenheit (-73 degrees Celsius) is about 60 percent propylene glycol. Its slush point is around -60 degrees Fahrenheit (-51 degrees Celsius) and should protect PVC and similar materials down to about -80 degrees Fahrenheit (-62 degrees Celsius). The more concentrated product will be more expensive, but its cost is insignificant in comparison to the damage that can result from under protection.

A much more accurate way to determine what level of protection to use is to ignore the burst rating and match the slush point of the antifreeze to the lowest temperatures that may be encountered. This provides a margin for error and will help to ensure that the antifreeze solution will never get beyond the initial crystallization stage, so no potentially damaging pressures will be created. The slush or freezing point may not be prominently marked on the product label, but most manufactures publish charts showing both the burst and slush points of their products.



(Deane Hislop in partnership with Freedom Marine)

david8282

土豆小丑下台吧 发表于 2023-11-19 03:04
笑掉大牙了这位。不懂就算了，还装得挺懂的。哈哈哈。

https://www.youtube.com/watch?v=T6DDxs4RLpg

What type of Marine Antifreeze is SAFE for Winterizing ALL Boat Water Systems & Engines?

david8282

土豆小丑下台吧 发表于 2023-11-19 03:04
笑掉大牙了这位。不懂就算了，还装得挺懂的。哈哈哈。

https://www.valvolineglobal.com/en-eur/marine-coolants/

MARINE COOLANTS: BOAT MAINTENANCE AND GETTING READY FOR THE SUMMER SEASON
Much like the case with car and truck engines with internal combustion, marine engines also need to be kept cool. Using marine coolant is among the basic aspects of proper engine maintenance and it needs to be approached with adequate consistency, know-how, and competence. Boat engines that are properly and regularly maintained in terms of the use of marine coolant last longer due to the mitigation of overheating scenarios.

Aside from the entire engine being kept at optimal working temperatures, regular use of the right boat coolant optimizes the workflow of the cooling systems as well, allowing them to also extend their lifespan.

HOW OFTEN TO REPLACE MARINE COOLANT IN MY ENGINE?
We suggest following the engine manufacturer's recommendation, but - typically - the required interval is 5 years (or 1,000 to 10,000 working hours). Also, bear in mind that marine coolant is not replaced in the winter.

HOW DO BOAT ENGINE COOLING SYSTEMS WORK?
Now, unlike a car or a truck motor, boat engines have the privilege to be in the immediate proximity of water, which means that boat engines can utilize the water from below the vessel to keep themselves cool and working at optimal temperatures. Depending on the geolocation of a boat owner, the water beneath the vessel is either saltwater or freshwater. The cooling system injects the water that is then run through the boat engine to act as boat coolant while the engine is running.

Depending on the type of the boat engine cooling system, the water that is being sucked up from beneath the vessel is then working together with marine coolant for improved performance of the cooling system.

TWO MAIN TYPES OF BOAT ENGINE COOLING SYSTEMS
Boat engine manufacturers have two basic ways to engineer the cooling system of a marine vessel. These 2 systems include:

Raw Water Cooling Systems
Closed-Loop Cooling Systems
RAW WATER COOLING SYSTEMS
This model injects the water out of the lake, river, or ocean into the engine through a strainer (or filter). The water then cycles through the boat’s engine block. When the water completes its cooling task, it is ejected through the exhaust systems out the back (if the motor is an outboard one), or through the exhaust below the boat (if the engine is inboard).

CLOSED-LOOP COOLING SYSTEMS
Although there are various different ways this cooling system can be set up, the two main models of closed-loop cooling systems include:

closed-loop half
closed-loop full
Typically, closed-loop cooling systems inject the water into the engine and run it through a series of heat exchangers. One side of the heat exchanger deals with the injected water, while the other side uses marine coolant that goes through the engine block as well.

THE ADVANTAGES OF CLOSED-LOOP COOLING SYSTEMS
Generally, enclosed marine engine cooling systems are deemed superior to their counterparts - raw water systems. There are numerous advantages that are best leveraged if you run your boat on saltwater. When the system uses saltwater, a corrosive scale builds up when the boat motor operates at temperatures over 140°.

The case with the raw water systems is that the corrosion tends to build up inside the engine’s water jacket and ports. This leads to corrosion scales accreting to an extent that the water can no longer flow through the engine, which then results in overheating. If this is the case with your engine, we strongly suggest you seek professional servicing assistance, while it can also mean - depending on the level of corrosion - that it might even be time for a new boat engine.

Enclosed cooling systems use the raw water that goes through the engine’s water jacket and ports, but they also deploy marine coolant products. However, the raw water flows only through the heat exchanger. Granted, the same type of corrosion scaling tends to happen here as well, but in enclosed systems, once the water flow gets jammed and the motor starts to overheat, there’s an option to acid boil the corrosion scale and remove it from the heat exchanger. This will enable you to continue to use the engine.

The worst-case scenario with closed-loop cooling systems in this context is that you would probably have to replace the heat exchanger, which is still a much more cost-effective option than having to replace the entire engine.

Other key components of both types of marine engine cooling systems include:

Seacock
Sea strainer
Hoses
Clamps
Belts
Water pump impeller
CORROSION AND ITS PREVENTION
As we already mentioned, there are certain downsides to having an unlimited supply of cool water, and that is corrosion. As the heat exchangers in these systems operate at high temperatures, certain metal parts of the engine are constantly fluctuating in size. This expanding and shrinking dynamic causes these surfaces to deteriorate, which means that the seals and o-rings require regular replacement.

In order to prevent their marine engine from being ruined by corrosion, boat owners need to first change their mindset toward this task. Far too often has the following mantra been heard within the boat owner community - I do not use my boat as regularly as my car, so do not need to strictly follow routine maintenance best practices. Or something to that effect. This type of thinking can be quite dangerous, especially within saltwater boating environments.

For example, if your engine’s o-ring starts leaking, that almost always means that the saltwater has been introduced to the exterior of your motor. In time, this will lead to corrosion that is likely to destroy numerous components of your engine, while it can also cause serious damage to the cooling component sealing surfaces.

It is also important to mention anodes. Marine engines that are not being serviced regularly will use the same anodes for prolonged periods of time. As the main task of the anode is to collect the corrosion in a sacrificial manner so other, more expensive components of the engine would last longer, it is crucial to change them at regular intervals.

ENGINE HORSEPOWER AS THE FACTOR
The simple rule of thumb in terms of engine horsepower is - the more horsepower an engine has, the higher the temperatures it operates at. This results in stronger marine engines requiring bigger and more efficient cooling systems. These systems may need more maintenance on the owner’s part, so we recommend that you consult your engine owner’s manual for optimal maintenance tips in terms of marine coolant use, as well as anode replacement and other small tasks this process involves.

THE MAINTENANCE OF MANIFOLDS, RISERS & EXHAUST ELBOWS (IN PETROL ENGINES)
Exhaust manifolds and risers account for the exhaust components cooled by the water. The manifolds are bolted onto the engine, while the risers are mounted on top to lengthen the distance between the exhaust exit and the water level. The water level shouldn’t be above the exhaust level, otherwise, the water might get inside your engine.

The lifespan of risers and exhaust manifolds is between 3 and 7 years, depending on whether it is marine coolant or salt-water that runs through them. If these components get blocked, it means that the rust and corrosion caused irreversible damage to their interior. Here, simply cleaning them won’t do the trick. This means that it is time to replace them.

Also, there are 2 types of manifolds: wet-joint manifolds and dry-joint manifolds. Wet-joint manifolds and risers require checkups every 3 years (but can last up to 5 years in saltwater). Dry-joint manifolds and risers can go up to 8 years, and provide a lower risk of water entering the engine. Should you see that these components are leaking externally, it is recommended that you remove and inspect manifolds and risers immediately.

THE MAINTENANCE OF EXHAUST ELBOWS (IN DIESEL ENGINES)
Diesel motors often feature exhaust elbows. These elbows have the cooling water introduced before it exits overboard to cool the exhaust, which means it is also susceptible to blockage. It is strongly recommended that you check the health of exhaust elbows regularly.

THE MAINTENANCE OF AFTER-COOLERS (IN DIESEL ENGINES)
After-coolers with alloy housing are often found in newer marine engines that are capable of generating a higher horsepower from a small engine block. These after-coolers are deployed to cool down the air and make it denser before it enters the intake. This allows the engine to combust more air and fuel in fewer engine cycles.

However, this system requires regular servicing so o-ring and housing failures are mitigated. The typical interval for cleaning, greasing and refitting the coolers is every 3 years. This will keep them operating with optimal performance. If left unchanged, after-coolers can leak and give away to corrosion.

HOW TO AVOID COOLING SYSTEM ISSUES
FOR PETROL MARINE ENGINES
Always make sure you use the recommendations made by the engine manufacturer to remove, inspect and change the parts of the cooling system. Here are some general rules to keep in mind:

Exhaust manifolds and risers are replaced every 3 to 7 years
Heat exchangers should be inspected every 3 to 5 years
Make sure you keep a consistent log of when the exhaust manifolds and risers, as well as heat exchangers and oil coolers, were serviced
Be sure not to forget about anode replacement
Keep the log of when the marine coolant is replaced
FOR DIESEL MARINE ENGINES
Always make sure you use the recommendations made by the engine manufacturer to remove, inspect and change the parts of the cooling system. Here are some general rules to consider:

Exhaust elbows and heat exchangers should be replaced every 3 to 7 years
After-coolers and oil coolers should be inspected every 3 to 5 years
Be sure to keep a log of your last salt-water service (3 to 5 years most typically)
Be sure to keep a log of your last exhaust elbow inspection
Do not forget about anode replacement (typically on a yearly basis)
Keep the log of when the marine coolant is replaced
It is a good idea to flush and clean your marine engine with fresh water after it has been operated on saltwater
BUYING A USED MARINE ENGINE? HERE’S WHAT TO CONSIDER
Those planning to buy a used engine should be aware of several tell-tale signs that the engine is not in optimal condition. For example, you can find an engine that is more than 5 years old but its previous owner(s) didn’t keep a maintenance log. If this is the case, and there’s no service history of the cooling system, the safest approach is to assume that servicing hasn’t been done recently and you should - despite the cost - perform regular maintenance and replace all the necessary parts.

When test-running the marine engine, be sure to run it at full throttle for a prolonged period of time. This test will show if the running temperatures are too high - above 92 degrees Celsius or more. If this is the case, the cooling system is likely experiencing a blockage.

CHOOSE VALVOLINE™ PRODUCTS
Open waters, as well as other similar environments, can be unforgiving on your marine equipment. This is especially true for the engine in the long run, and you need to make sure that your vessel’s powerhouse gets only the top-tier oil, marine coolant, antifreeze, etc. Only then will you be able to set sail with adequate confidence. The confidence that your engine is running at optimal performance and is properly protected against deposits and corrosion.

This is where we come in.

Valvoline’s main mission is to provide vehicle owners with the best possible products available on the market. Our marine solutions are developed alongside Cummins and other manufacturers to deliver on a wide variety of marine conditions and technical requirements. Backed by the support of a dedicated technical team, you can trust that our marine products stand up to your vessel’s design and conditions, delivering value and allowing you to maximize every engine hour.

Our offer includes top-tier marine coolant and oil-based products that help your engine achieve peak performance and have a longer lifespan. With more than 150 years of experience, our clients know that all Valvoline products are meticulously developed and tested.

Our premium-quality oils, coolants, and lubricants are a result of enormous dedication, tangible experience and innovation, and the use of high-end technology. All Valvoline fluids are carefully selected and field-tested by our expert research teams. The testing is conducted within our state-of-the-art facilities so we know they always deliver maximum performance, minimum downtime, and optimized costs.

Here at Valvoline™, we care about your priorities and share the same goals of keeping your machinery, vehicles, and equipment functioning in rough territories in the toughest of conditions.

david8282

yang在水一方 发表于 2023-11-18 22:37
你考个船牌先，然后你就知道你的高见有多么荒唐， 真是只要自己绷的住那根筯， 尴尬的是别人 ...

https://www.westmarine.com/west-advisor/Selecting-Antifreeze.html

CHOOSING ANTIFREEZE FOR YOUR BOAT’S SYSTEMS
Learn about freeze protection and burst protection and why propylene glycol-based antifreeze is the best choice.

david8282

完善自我 发表于 2023-11-19 00:05
看来你是真不懂船哪，船的发动机就是靠湖水或海水冷却的

The Chemistry Of Boat Engine Coolant | BoatUS

Early automobiles used plain old water to cool the engine. It's not only cheap and plentiful but, to this day, water remains the most efficient engine cooling medium you can use. That being the case, why are we even talking about antifreeze and coolant? The problem is that while water is the most efficient way to cool an engine, it isn't the best way to cool the engine for a number of reasons.

First off, water is corrosive to internal engine components. It also freezes in cold weather and boils in hot temperatures (turning to steam), both of which can result in engine damage. The solution was to add antifreeze to the water, which not only addresses freezing, boiling, and corrosion, but also prevents the formation of limestone deposits and foaming. It additionally provides lubrication for pumps and other components of the system that require it.

樹葉的選擇

我傾向選擇相信修理工的話！因為我的船和渡假屋就得到過當地西人這樣無私的幫助！而且船的確需要你掌握一套可能你之前完全不知道的知識和水上常識

土豆小丑下台吧

David198282 发表于 2023-11-18 16:53
我不认同这位的观点，如果船的引擎需要海里或者湖里的水冷却，那么发动机坏的更快。

即使是汽车的引擎， ...

笑掉大牙了这位。不懂就算了，还装得挺懂的。哈哈哈。

digging

免费维修，这白人说着连自己都相信了。

完善自我

David198282 发表于 2023-11-18 16:53
我不认同这位的观点，如果船的引擎需要海里或者湖里的水冷却，那么发动机坏的更快。

即使是汽车的引擎， ...

看来你是真不懂船哪，船的发动机就是靠湖水或海水冷却的