LOW WOT RPM (3 litre Mercruiser) EVEN with different props

[Don S]

Re: LOW WOT RPM (3 litre Mercruiser) EVEN with different props

The gear ratio can be easily checked. Just put the drive in gear, turn the engine till the prop starts truning a little. Then turn the engine and count the turns of the engine and see how many full and partial turns of the engine trun the prop 1 complete revolution.
With a 1.98 Gear ratio for a 3.0L you should see 2 complete turns. a 1.5 ratio would be one and a half turns of the engine for one of the prop.

 

[Mr. D]

Re: LOW WOT RPM (3 litre Mercruiser) EVEN with different props

Happy to try it Don. Now, how the heck do I count the turns of the engine. I can count prop revolutions but that's it. Thanks.

 

[Mr. D]

Re: LOW WOT RPM (3 litre Mercruiser) EVEN with different props

Hello Don S.

Sorry for my ignorance but I really have no idea how to verify engine turns. You suggest simply to put the drive in gear, turn the engine till the prop starts turning a little. Then turn the engine and count the turns of the engine and see how many full and partial turns of the engine trun the prop 1 complete revolution. Again, sounds great, but how do I verify engine turns?.

CHEERS!
Mr. D.