Carbon buildup occurs in every engine as a residual effect of combustion. By using Yamalube Ring Free Fuel Additive, carbon build up can be removed from your pistons, intake and exhaust valves, piston rings and cylinder walls. Keeping these components free of carbon buildup is essential in maintaining performance and operational efficiency. If you use ethanol blended (E10) fuel, choose Ring Free PLUS. This formulation was specifically designed for E10 fuels. This special formulation also protects against the corrosive effects of sulfur compounds on electrical parts and fittings in the fuel system.

The types of gauges available are tachometers, speedometers, fuel management gauges, and combo speed/fuel management gauges. The gauges come as either square or round in shape. There is more viewing space on the square gauges than the round-types. They both provide the same features with one or two exceptions depending on the type of gauge. Because these gauges have so many features go here to learn more about Command Link features.

Digital Electronic Control (DEC) electronically controls all throttle and shift functions giving you incredibly smooth control. It comes with automatic RPM synchronization for your twin and triple engine applications. Each control has built in redundancy systems for added reliability. Currently there are only 3-models that have the ability to use the DEC system. They are: F350, F300 and the new F250.

Because of the multitude of different applications, most outboards do not come with a standard propeller. To find out what propeller was originally fitted on your outboard when it was sold, or to get a recommendation for a propeller, contact your boat manufacturer or selling dealer. For a recommended propeller, you can also look at our performance bulletins for your application or a similar one. Here is a list of Yamaha engines that do come with a standard aluminum prop.