I am in the process of fitting my new open ocean engine
maker and I am at the stage of determining what size pulley to fit on the engine
. This is determined by what rev range I want to have the engine at when making water
i.e. when I am motoring or if anchored up at idle. The obvious issue for gearing up the system to run when the engine is at idle is the engine pulley needs to be huge to be the correct ratio to the 7' pump pulley.
The pump needs to run at between 1320 and 1750rpm and the engine idles at 700 rpm
and motors on ave at 2000rpm so where do I pitch
it i.e. closer to idle speed as practical or motoring speed?
In peoples experience when offshore
and coastal cruising when do you make water.
I already know about the pulley calculators so its just what engine rpms do I decide on?