Yep. Takes an expensive 4 stroke to out hp/ci a 2 stroke and the 60 merc is a far cry from high performance.
I like mixing gas and hauling azz myself. I get tickled at my friends who think four strokes are more reliable.
Hi,
I am the guy with the boosted honda 50hp
Yes the camshaft made a hudge difference in the high rpm, i now keep getting the rev limiter at 6600rpm with 4 blade cleaver 10.5x18,
The engine is tweaked on the ignition by at least 3 degree of advance. This also make a hudge difference, let just say it is not a quiet honda anymore. Once you twist the gas, there just no lag, it will spin to the top.
Ive since bought a brand new boat, my next bet is a yamaha 70hp, these engine with a simple ecm reflash can gain 15hp, it would be even more with porting, camshaft and more compression.
The major problem i had with the honda is oil ingestion by the pcv tube at high rpm. It could be easy fixed with a catch can.
If you balance the engine i think it could run easy over 8k rpm. With headwork also !
Lundin marine can reflash any 4stroke and is located in norway. He is a king pin.
JBmecanical is located in australia. That guy live tune outboard.
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Where are you out of Flx?
I am located in canada quebec, excuse my poor english !
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Yamaha f60 and f70 are infact same engine, beside the engine head,
The lower unit on the f60 is very interesting, with 1.85 gear ratio, a guy on facebook told me you could swap both.
My plan is to get a f70 with the f60 lower unit, and then get the ecm reflash.
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We raced the Mercury formula race motor for one season. It was loaned to us by Mercury Racing. It needed the gears from the two stroke motor. Other than that it was great.
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