Posted by wrangler on 03/22/17 - 5:19 AM
#8
I put a Yamaha 90 4 stroke on my 1979 Montauk back in 2005. Could not be happier. Moved the battery to the console. It gets 5-6 miles per gallon. A big difference you may want to look at is Alternator output. The New 90's have 35 amps, the 70's only 17 amps.
If you have chart plotters, depth finders, radios etc, 35 is better than 17.
Yes it sits a little lower in the water, but I never worry about the battery going dead. If I need to replace my motor, a 90 is what I will replace it with. The 75 and 90 weigh the same, only the 70 is lighter but less amps.