Jim@sea
Well-known member
My auxiluary outboard is a 20 year old 9.9 Evinrude 2 stroke. I understand that this engine is actually a detuned 15hp as Evenrude/Johnson did not actually make a 10hp and in some countries certain boats with "Under 10hp" were allowed less rectrictions, this is why its a 9.9 and not 10.
Certainly in the 600 page Workshop Manule which I have bought on CD for peanuts off Ebay it shows the same engine/carburettor.
So what is it that converts it to a 15hp, perhaps different carburretor jets as once converted it wont rev any faster. Perhaps a different camshaft.
I need to take the engine in for a 20 year service as I dont think the impeller has ever been changed so if I can find out what the modification is I would have it done at the same time.
"Thinks" It couldent be somthing simple like a propellor change could it ??.
Certainly in the 600 page Workshop Manule which I have bought on CD for peanuts off Ebay it shows the same engine/carburettor.
So what is it that converts it to a 15hp, perhaps different carburretor jets as once converted it wont rev any faster. Perhaps a different camshaft.
I need to take the engine in for a 20 year service as I dont think the impeller has ever been changed so if I can find out what the modification is I would have it done at the same time.
"Thinks" It couldent be somthing simple like a propellor change could it ??.