Quote:
Originally Posted by DoozleD
Bushwaker,,,its a alum 3blade 13 1/4 by 17...it gets on and stays on plane at a low rpm witch I like and agree with u on, but I feel like the migrange just sucks!...
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Sounds like you're about 700 rpm too low, so that's a lot, especially on a 4-stroke that has to be wound up pretty tight to make power! Don't know if dropping down to a 15" pitch would get you that much rpm but worth a try. A good shop can easily repitch an aluminum prop, so I'd try that first. Also check motor rigging to make sure throttle butterflies are fully open at WOT, that timing is correct and motor is otherwise healthy (compression check, fresh plugs & fuel, etc.)
I ran a 1975 115 V-4 300 lb 2-stroke on my Seafari that was probably only about 100 hp at the prop. (Motors were rated at powerhead back then.) It had a 2.0:1 gear reduction and a 13 3/4 X 15p SST prop was perfect. Gave me 32-35 mph WOT depending on load; cruised at 22-23 mph @ 4500 and would plane at 12 mph. Averaged 2.8 mpg on 6 Bahama trips with a very heavy load. Loud and smokey but otherwise a great motor that never quit on me once in over 30 years!