Carbon Build Up

Today’s fuels contain numerous additives which cause excessive carbon build up on pistons and rings. If left untreated this will cause your pistons to “stick” and ultimately blow up.


  • Decarbonize your engine twice a year with “engine tuner” by BRP.
  • Add “Ring Free” by Yamaha or “Carbon Guard” by BRP to your fuel tank.
Carbon Gum Up

Today’s fuels can lose their octane ratings in as little as 3 weeks. Lower octane and the additives in today’s fuels will cause carbureted motors to gum up and lose their high-speed range. Other motors may also run poorly.


  • Add “2+4 Fuel Conditioner” by BRP or Yamaha Fuel Conditioner to your gas before you let your engine sit. If your engine is used less than every 2 to 3 weeks, you should keep this in the gas all the time. NOTE: Never use automobile fuel conditioners as they contain alcohol which will blow up 2-cycle engines.
Water Pumps
Water pumps should be changed every 2 to 3 years even if used infrequently. Their rubber parts deteriorate with age as well as use. If you run a lot of shallow water, especially with sandy bottoms, you will need to change your water pump more frequently.
Trailer Tires
Check your tire pressure frequently to be sure the tire is properly inflated to manufacturer’s specifications.
Trailer Bearings
Trailer bearings can fail because of too much grease as well as too little. Use bearing buddies to keep the grease in and STOP filling as soon as the diaphragm moves. New style bearing buddies have a blue ring to help you see the movement of the diaphragm. If you are unsure, ask us for a demonstration.
Ethanol Fuels

Ethanol fuels can be a real nightmare to boat owners. Ethanol poses 3 problems for boat owners. 1. It acts as a “cleaning agent”. That means the ethanol will loosen any dirt or debris in the tanker truck that hauls it, the gas station tank that stores it and your gas tank. This suspended gunk will then flow thru your fuel system and can clog your fuel lines, carburetors or fuel injectors and fuel filters. 2. Ethanol absorbs/attracts water. Just sitting in your gas tank, the ethanol can draw in water from the outside air. This can be especially bad at dock side “gas stations”. The water will also cause “phase separation”. That means the fuel/water mixture will separate with the water going to the bottom of your tank….where your fuel pickup is, resulting in a deadly gulp of water and then alcohol before the actual fuel can make it to your power head. This causes poor running, engines dying and falling off plane and piston detonation. This also causes the shelf life of your gas to decrease to around 20 days. 3. Ethanol does not mix well with the other blends of gas (MTBU). If you should accidentally mix the 2 blends of fuel (use half a tank of gas and then top it off with another blend) the fuels will form a coagulated mixture that can clog your fuel system to the point that the entire carb and fuel lines will have to be replaced. A 50/50 mixture is the deadliest.


  • Nothing is an absolute cure. To lessen the effects, use a fuel conditioner as discussed in item II Carbon Buildup. This will inhibit the water absorption and prolong the life of the fuel. Put a 10-micron fuel filter/water separator in the fuel line. This will help keep the tiny suspended debris out of your injectors/carbs and take the water out BEFORE it hits the power head. Change your filter at least once a year and keep an extra onboard in case you get water in your fuel. Periodically pour out the contents of your filter into a glass container to inspect your system for any water or debris. Avoid refilling a half full tank with fresh gas….or make sure it is the same type you put in before.

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