Re: How WOT why ?
If you are referring to all the WOT and rpm questions, maybe this will help.<br /><br />When running your engine at WOT, if it is reaching but not exceeding the recommended rpm range, the current set up is acceptable. By setup, I mean engine performance, prop, engine height, boat weight, etc.<br /><br />WOT is used as a measure of how the whole package is working. If your engine is functioning properly, but not reaching recommended rpm, then something is putting too much stress or resistance on the engine. It could be a prop with too high a pitch. It could be no spark on one cylinder.<br /><br />This is how you can zero in on the correct pitch prop to use.<br /><br />If your WOT rpm have been in recommended range, but now they have dropped 1000 rpm, you know to look somewhere other than the prop, perhaps an ignition failure, a carb problem, or 500 lbs of water in the bilge.<br /><br />2 stroke engines like to run at high rpm. You could run at WOT all day, or till you ran out of fuel and snacks. But best fuel enconomy is usually somewhere between 3000 and 4500 rpm, depending on the engine. <br /><br />Maybe I should say that 2 strokes run better when the resistance or load on the engine is limited to the point, that recommended rpm's can still be achieved at WOT. Any more load than that would "lug" the engine. Any less load than that could over rev the engine. <br /><br />The engine operates best when the load matches the engine. Your setup is how you match the load to the engine. On a car, you have a transmission that does this. <br /><br />But yes, there are lots of boaters that just like to go fast.
