Most marinized engines use a regular flywheel. A flexplate is typically
used with an automatic trnsmission and in that case the torque converter
acts as the flywheel weight.

"Tim" wrote in message
ups.com...
On Feb 19, 9:32 pm, "Danlw" wrote:
"Grant" wrote in message

...

Has anyone in the group had experience with a rattling BMW MKII
sterndrive
unit or an early Volvo which is similar. Mine rattles loudly after a
run
on the plane when you come down to idle speed. It wont rattle in
neutral
till you get the revs up to about 1800 then the rattle comes back.

It has no decernable rattle under load, just idle after a planing run.
The
unis and gimbal bearing have already been replaced. When I dont use the
boat a few days and start up it is quiet at first, but always comes
back.

Anyone?

Thanks
Cam

A flex plate can do that. Might be worth checking.

Dan

I was thinking the same thing, But I wonder if the engine actually has
a flex plate (like an automatic trans) or if the ring gear or is
pressed on the flywheel (like a manual shift)?