The former boat with hours may be in far better condition, with fewer long term maintenance issues and actually last years longer. Time can sometimes be harder on boats than usage. Take a boat that has sat idle for most of it's life with low hours, and a boat that has been used three times as much, lovingly maintained and serviced, and used regularly, and the boat with low hours can often be more problematic corrosion, impellers taking shape, fuel degradation, sun exposure, etc.
Higher hours can tell you one thing for certain If the previous owner put a high number of hours on it, they had to love using it, and it had to work well to do it! Isn't that in of itself a possible predictor of satisfaction?
Boaters often put artificial ceilings on hours: anything over is too high for that age, etc. The truth is, that if the boat got used, it got loved. Marine gasoline engines can run hours or more if properly maintained before needing a major overhaul. Most boats greater than 15 years old, and even some built today with certain power options, do not have an hour meter. If you find an older boat with an hour meter, how do you know if it is original equipment?
When was it installed, and has it been changed out? Low hours could be signs of an import. If a boat was imported from the US, and was used in a salt environment, or a sunny climate, it could be "distressed". First things first, you want the motor to be clean. If the motor is not clean, it is safe to assume the previous owner did not properly care for it.
You also want to pay special attention to gunk or grime deposits. Not only do these indicate motor neglect, but it could also be evidence of ethanol contamination on a gas-powered engine. Most gasoline fuels that are made today use some amount of ethanol in them. Marine engines were historically not designed to run on this type of fuel, and non-ethanol marine fuels are not always available. As a boat owner, you will want to make sure if you are not buying ethanol-free fuel, add the proper additives to lessen any possible ethanol problems.
You also want to test the used motor and make sure every aspect is in working order. Check for signs of smoke, excessive noise, or vibrations. One major factor in engine life is whether or not the engine uses diesel or gas.
To keep your engine from wearing out, you will need to make sure you change the oil at the proper intervals. This recommends oil changes for standard use.
If you are traveling and have a hefty load, dirty air, or high temperatures, you will want to consider changing the oil more often. If this is not the case, there is no benefit to changing your oil more often than is recommended. But do change it at least once per year. Rough operation techniques can include extended low-speed operation, incomplete burning of fuel, or weighty loads. You can also consider using synthetic oil. Synthetic oil often lowers wear rates compared to petroleum oil.
It is hard to say how much this extends engine life, but it should help. If you keep your boat somewhere where the weather gets cold, you should drain and refill the oil before the boat is winterized. When you start your boat back up in the spring, you will want to make sure you let the engine idle to recirculate the oil. Since the oil has probably settled, you will need the oil circulated back through the system. When you change the oil, make sure you change the filter as well.
You should keep track of the date you change the oil and filter, so you know when you need to do it next. You can also try to motor at the most efficient cruising speed for your vessel and motor. This will burn the least amount of fuel, which can extend engine life. No matter what type of engine, the components inside can be at risk with saltwater exposure. Saltwater can cause corrosion in metal. This can be combatted by inspecting your engine for corrosion regularly. When you find corrosion, you will want to deal with it immediately.
To deal with corrosion, you will need to remove it down to the bare and base metal. After this, prime the area and paint it with manufacturer-approved paint. Like rust and other issues, the earlier it is caught, the better off you are. If you do not find it in time, you will have to replace the component. This can be more expensive than simply dealing with the corrosion. We have an in-depth article here with some things you need to know before you take your boat out in saltwater.
One area to make sure you check properly is the exhaust elbow on inboard engines. This is where the water leaves the engine block but also where the exhaust gases also leave. If the exhaust elbow fails, you could be looking at an issue that can vary from a messy leak to engine overheating. Preventative maintenance is also a key factor in engine life.
Preventative maintenance means to replace or repair things before they are needed. Overheating can deform the internal components due to the extra heat. This can cause the internal components to need to be replaced or even the entire engine.
To reduce overheating, you should replace your coolant when recommended. While you are underway, you will want to make sure you keep an eye on your gauges. Keep an eye on your temperature gauge while out. You will also want to make sure your engine alarm system is operating as it should be. This will alert you to any possible problems with your engine. If your alarm does go off, you will want to make sure you reduce your engine speed or possibly shut the engine down completely.
If you continue to run your engine at high temperatures, you can cause internal damage to your engine. This might not be visible right away, but you will notice this damage in the long term. Marine engine builders recommend that engine compartments get dry, cool, and clean air while running. You should also run your engine compartment blowers for at least 5 minutes before you start your engine. This allows your engine to run in clean air at all times. You should also keep an eye on your exhaust.
If your exhaust does not run clear, you will want to know why. Single cylinder four-stroke 6hp portable outboard motors are unique in the recreational boating world. We will never look back "as long as we are able to afford the new stuff". This progression has happened with motorcycles " hp in stock form and running sub 9 sec.
Two - stroke outboards are not banned The newer generation of two - stroke outboard engines are equipped with direct fuel injection technology which reduces the engines' emission level to meet the requirement of the Outboard Emissions Law. Only carburettor-based outboard motors will be banned starting July 1, Two- Stroke Outboard Motors: A two - stroke engine works by featuring a compression stroke followed by an explosion stroke , which uses the previously compressed fuel.
Additionally, two- stroke engines are less fuel-efficient, get fewer miles per gallon and produce more emissions than four- stroke outboard motors. How to service a 2-stroke outboard engine Do it yourself! This step-by-step guide takes you through a service of a small 2-stroke outboard. Check the spark plug. Check the recoil starter. Remove, strip and clean the carburettor. The lower leg. Remove the gearbox to check the water pump. On smaller engines with only one gear….
The technology is considered 2 - Stroke , Direct Injection. The Life Expectancy of the Marine Engine. The average marine gasoline engine runs for 1, hours before needing a major overhaul.
The average marine diesel engine will run for more than three times that long and log an average 5, hours under the same conditions. Yamaha and Mercury have stopped producing direct-injection 2 - stroke outboards Tohatsu still builds a few , but the latest-generation 4- strokes weigh the same as 2 - strokes and offer the latest digital advances. Miami Beach, Feb. Here is a bullet list of features this behemoth of a motor possesses.
Generally they saw about hours. So for the last four years they have been replacing those etecs with Yamaha 4 strokes and are having great results no issues. Plug in the YDS cable to your engine.
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