Fly wheels

[91rr]

Is there a reason why I would not want to use a much lighter automotive flywheel on a boat? I am doing an engine swap going from a 5.0 to a 5.7 and was wondering that question. I know one of the reasons marine applications use a heavier flywheel is to prevent over revving if the prop comes out of the water. I am putting a rev limiter on to prevent that issue. Is there any other reasons that I am unaware of?

 

[91rr]

Re: Fly wheels

I found this on another site. Exactly the info I was looking for.

The heavy flywheel makes it idle smooth and keeps it from stalling when shifting between forward and reverse at the very slow idle speed marine engines need to run at so as to be maneuverable at slow or no speed around docks and water-skiers. Some marine wheels weigh 40 lbs and have no clutch bolt holes. Heavy flywheels make boats more stable because of the large amount of gyroscopic force.

 

[Bondo]

Re: Fly wheels

Is there a reason why I would not want to use a much lighter automotive flywheel on a boat? I am doing an engine swap going from a 5.0 to a 5.7 and was wondering that question. I know one of the reasons marine applications use a heavier flywheel is to prevent over revving if the prop comes out of the water. I am putting a rev limiter on to prevent that issue. Is there any other reasons that I am unaware of?

Ayuh,... Generally speakin',... 'bout the boats We see here at iboats,...

The flywheels are nothing but a standard shift clutch flywheel outa a pickup truck...
Most later couplers use the pressure plate bolt holes...

Though, I hear they run aluminum flywheels in Hot Rod Jetboats,...