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Marine Engines & Boat Engine Maintenance for editorials and information about how to maintain your boat's propulsion systems.
Marine Engine Care and Maintenance.
Breakdowns and run out of fuel are probably the hightest incidents leading to VMR "assists". As a responsible recreational boat operator there are number of actions you can take to ensure the safety of yourself and passengers and to make for your enjoyment on the water.
Inboard Engines:
* Regularly check belt drives for condition and tension.
* Check engine and gear oil levels.
* Inspect for, and treat rust, corrosion and electrolysis - especially places out of sight, eg: sump.
* Tighten bolts, ie: engine mountings and drive shaft couplings.
* Check water and fuel lines for leaks and weak spots.
* Check fuel tanks for water ingress. Drain to sample.
* Check all glands - prop shaft and rudder post. Repack & grease.
* Check battery security and electrolyte levels.
* Check the raw water filter and fuel filters. Check fuel water traps.
* Attend to all oil points.
* Check wiring for looseness and wear.
* Keep the engine and bildge clean
* An onbord "Trouble Shooting" chart may be of help in tracing engine faults, but it's safest & cheapest to leave most things to the experts.
Outboard Engines:
* Check fuel tank for water and rust.
* Regular checks of flexible fuel lines for weak spots and wear. Select correct grade of petrol and oil.
* If you do not have an oil injection system you should add oil to the tank first, then petrol, in order to ensure better mixing.
* Measure oil with graduated container - near enough is not good enough. Only special outboard grade oil should be used.
* Do not add extra oil unless so indicated by the maker. If you use a fuel and oil mix, run until the carburettor is dry at the end of the day.
* After use in salt water flush through with fresh water.
* With hood off, spray with moisture control fluid i.e. WD40. Do not spray under the flywheel. Replace hood, clean with car shampoo & hose off.
* Grease all nipples regularly.
* Check gear oil regularly.
Oil that is thick and yellowish has water in it. If it needs topping up it is probably leaking. Find the cause of the leak or water ingress; do not just replace it. Only use special outboard gear oil. Refer to the manufacturer's specifications or ask a qualified marine mechanic if you are unsure.
Other Issues to consider:
* Spark plugs should not be screwed too tight.
* Check for nylon fishing line around the propeller. It can cause damage and ruin the gearbox oil seal.
* Carry a spare propeller and shear pin (if applicable).
* Grease prop shaft for ease of removal. Inspect for propeller wear.
* Chips in the propeller or uneven wear may cause vibration, engine wear, loss of efficiency and economy.
* When storing for any time, remove plugs, pour small amount of out board oil into cylinders, turn flywheel - this prevents piston rings sticking.
* Turn the flywheel occasionally to make sure it is still moving freely and does not seize.
Do not play the mechanic. Call for the expert. Outboards can be touchy.
Regular servicing should be done according to the maker's instructions. And remember..."Safety by all means"
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