Originally Posted by cameronke
I am replacing my 15 year old Mariner 60hp (3cyl 2 stroke) with a couple of year old Yamaha 50 (4 cyl 4 stroke) on my 5.5m Northcraft
The lad that sold me the Yamaha 50 claims it will be almost the same power as the Mariner 60, his reason being that the Yamaha is rated at the prop whereas the Mariner is rated at the power head.
Would you concur?
Certainly the Yam prop is about 1.5 times the size of the Mariner.
Anyone any idea how performance and economy might compare?
No. He's talking bollocks.
The ratings changed from powerhead to prop in mid 80's. The 3 cylinder Mariners are prop rated.
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