Differences on Fast Strikes?

RockinRandy · 04-23-05, 07:58 PM

I've got a 150 Johnson Fast Strike. It is apparent that the 150 and 175 variants are built on the same powerhead and (I suspect) lower units, just as many 9.9/15hp engines are. The service book is of little help, indicating only that most of the tuning specs are the same. My boat is rated for a 175, so I'd like to find those extra 25 hp.

So, does anyone know what parts differ between the 150 and 175? Is it a matter of changing reeds, shaving heads, larger valves, what? And, would the parts-change to get the advertised 175 be illegal by the no-modifying-motors tournament rules (as in, it must have left the factory as a "175" to be legal, even though the parts would be the same in my 150/175 upgrade as were offered as-stock in the 175)?

04-23-05, 07:58 PM	#1
RockinRandy BassFishin.Com Member Join Date: Jun 2003 Location: Posts: 0	Differences on Fast Strikes? I've got a 150 Johnson Fast Strike. It is apparent that the 150 and 175 variants are built on the same powerhead and (I suspect) lower units, just as many 9.9/15hp engines are. The service book is of little help, indicating only that most of the tuning specs are the same. My boat is rated for a 175, so I'd like to find those extra 25 hp. So, does anyone know what parts differ between the 150 and 175? Is it a matter of changing reeds, shaving heads, larger valves, what? And, would the parts-change to get the advertised 175 be illegal by the no-modifying-motors tournament rules (as in, it must have left the factory as a "175" to be legal, even though the parts would be the same in my 150/175 upgrade as were offered as-stock in the 175)?

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