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ContinuousWave: Whaler Performance
60hp 2stroke on Montauk
|Author||Topic: 60hp 2stroke on Montauk|
posted 01-29-2003 08:40 AM ET (US)
The following may be of interest! I just replaced a early 90's Merc 70 (71 cubic inch) on my 77 Montauk with a 1995 Merc 60 hp (51 cubic inch) and notice the following by comparison (70hp figures first): Top speed 40 vs 37; optimum cruise 30mph vs 28; mileage 5mpg vs 7mpg...hole shot was brisk with 70 and almost as good with the 60, even with 4 adults aboard. Now, I did this to reduce draft and find that hull floats approx one inch higher ( I boat in very shallow water so an inch is like a mile.. etc). The Montauk is so easy to plane and get to speed that the 60 apears to be an ideal all around power choice, no matter the brand or 2stroke vs 4 stroke. The 60 is about 80lbs lighter and is soooo quiet at idle and at speed that is's unbelieveable! An unexpeted bonus is the handling and steering improvement with the UltraFlex no feed back system. If max top speed and skiing etc. are not goals a 60 will do a fine job.. BTY I'm running a 14" pitch Yamaha SS prop and the 60 has a 1.64:1 (not a misprint!) lower unit ratio vs a 19" pitch SS prop and 2.3:1 ratio for the 70hp... Just thought I'd share this trivial info and opinion...Happy Whalin'... Clark.. Spruce Creek Navy
posted 01-29-2003 09:53 AM ET (US)
I had a 60hp Johnson 2 stroke on my '77 and everything about it was fine except crusing speed @ 4000rpms (21mph) and top speed @ WOT(32mph). I put a 2002 Johnson 90 2 stroke on and cruising speed @4000rpms is 31mph and top speed @ WOT is 45+mph. Much better engine for this boat though the 60 was indeed light.
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