A friend put in a new Perkins M-30 with Hurth trans 2 years ago (34 ft
sail) and has gone thru 4 Hurth transmissions in 700 engine hours.

The M-30 engine is marinized and sold by Volvo as the 2030 with the
same Hurth trans private labelled as Volvo's own.

The engine is a high speed, high compression (23 to 1) 3 cyl that is
subject to high torsional dynamics at lower RPMs and this creates big
problems - wears our the splines on the drive plate and then chews up
the clutches in the trans. One trans lasted only 50 hours from new.

Perkins used a spring drive plate when sold as the M-30 - Volvo
switched to a 2 part rubber drive plate and apparently increaded the
weight of the flywheel to reduce the torsional destruction - wonder
how they knew and Perkins didn't?

Anyway - the question - who knows about 2 or 3 cyl diesels with
lightweight flywheels that tear up the trans with torsional dynamic
activity?