Home › Forum › Ask A Member › power hwad swap › Re: power hwad swap
February 27, 2017 at 3:03 am
#53596
Marty; I might have forgotten something more important than bolt pattern. Does your ’77 motor have a multi spline driveshaft or a 4 flute shaft at the top? Your gearcase won’t fit the newer midsection and of course a newer gearcase won’t fit your old powerhead if it has a 4 flute crank. Hope that makes sense. ’77 was the change over year for the 140hp V-4 & 25" 85 & 115hp motors to the new midsection with new trim. It was 1978 before the 20" 85 & 115 went the new style parts.
Dan in TN