Originally Posted by rcairboater
Hello Saito Engine forum! Well I have a question for the expert's. I want to use a Saito engine on a fan boat (airboat) and my hope is I can get some guidance. I will be using a regular airplane prop so the air from the prop will keep the engine cool.
I typically us a .46 two cycle engine, OS, So don't flame me too bad. I need your recommendations on a 4 cycle Saito that is comparable in power. I love the sound of the Saito engine. So with this being said what is recommended? Do you recommended I even use a 4 cycle Saito on a airboat? I read that the 4 cycles are high maintenance compared to 2 stroke. Your thought's on this?
I watch for the feedback,
Typically, multiply the displacement of the 2S by 1 1/2 to get a 4S of similar power.
In this case, maybe an FA72?
Be ready to re-think prop pitch as the 4S will make touque @ a lower RPM range..
More pitch and/or diameter will be in order to utilize the power band of the 4S.