My new boat has this engine
, supposedly an 18hp Yanmar
, which would in theory make it a 2GM20
or some variant thereof.
Trouble is it doesn't seem to look that much like one according to all the pics and even an online manual for the 1/2/3GM series.
I'm told the handcrank arrangement is 'owner built on' but it looks odd even without that, given that huge flywheel/pulley arrangement.
Anyone shed any light? I can't get to the boat for a few months yet, but trying to get everything sorted first, including some spares for the engine
I've no doubt the design of the GMs has changed over time, but it seems to look very little like one to my (inexpert) eyes.
Any advice appreciated.