Johnson Evinrude 6 and 8 hp.increase HP power

raczekp1

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Mar 30, 2010
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I'm working on 6 hp and 8 hp powerhead.only 2 differece is in carb and intake panel
 

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Vic.S

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May 4, 2004
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You daont say what year !

I have 6hp It is not really feasible to up rate it to 8hp because the manifold and reed valves are different and more importantly the crankcase is different. I guess the porting is different.
Ignition is different too
 

raczekp1

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Mar 30, 2010
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1,327
i dont know the year, but both motors are painted whait
both reed valves plates looks the same, crank case is also the same, ignition is the same( soon i will instal ignition taken from bad 6 hp powerhead to 9.9 74' -except ignition cam)
 

racerone

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Dec 28, 2013
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What model motors are you working on ???-----They are not all the same !!!
 
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