Post Number: 390
|Posted on Monday, December 07, 2009 - 09:27 pm: ||
I was just getting some understanding of two port and three port engines, now this five port shows up. How did that work?
Post Number: 49
|Posted on Monday, December 07, 2009 - 11:51 pm: ||
just write to them for the catalogue offered!
maybe they're just adding the amount of transfer ducts, or port windows, rather than piston covered port designations???
Post Number: 1126
|Posted on Tuesday, December 08, 2009 - 08:02 am: ||
Most likely a 2-3 port engine.
Erd and Acadia except the 3hp Acadia and some others. And Oh yea Yamaha motorcycles in the 70s. They called it "torque induction"
These engines have 2 passages from the carb to the crankcase. 1 uses a check valve to seal the crankcase on the down stroke of the piston 2 port and one uses the piston skirt to close the intake passage 3 port.
Hence the 5 port designation 2 port plus 3 port