"I fought the 40 and the ..........I won.........." to the tune of
"I fought the law and the law won" LOLOL
I've had this 63 40 HP Johnson out THREE times only to have trouble with it making power or even getting "up there" enough to make any. I was sure it was the carb, so here's "the deal" This is a diagram of a 64 which is not quite correct for this engine
The orifice, 82, is simply not there in this engine. There is a 90 degree passage with brass plugs driven in, and that seems to be the trouble as you can not access them physically, other than shooting cleaner through them. Something in that passage is partially plugged. This all feeds into a well in the bottom, not shown, and the bottom of the emulsion tube, 86, sealed to the well with a gasket, 78, feeds metered fuel up to the working area of the carb. So after screwin with this thing until I was ?? red in the face, I found an old 35hp--with an adjustable main jet, and put that bowl and needle onto the top of the 40hp carb. BANG She runs!!!
'60-ish Johnny-Rude 35hp, the float bowl bolts right on
"I fought the law and the law won" LOLOL
I've had this 63 40 HP Johnson out THREE times only to have trouble with it making power or even getting "up there" enough to make any. I was sure it was the carb, so here's "the deal" This is a diagram of a 64 which is not quite correct for this engine
The orifice, 82, is simply not there in this engine. There is a 90 degree passage with brass plugs driven in, and that seems to be the trouble as you can not access them physically, other than shooting cleaner through them. Something in that passage is partially plugged. This all feeds into a well in the bottom, not shown, and the bottom of the emulsion tube, 86, sealed to the well with a gasket, 78, feeds metered fuel up to the working area of the carb. So after screwin with this thing until I was ?? red in the face, I found an old 35hp--with an adjustable main jet, and put that bowl and needle onto the top of the 40hp carb. BANG She runs!!!
'60-ish Johnny-Rude 35hp, the float bowl bolts right on