Thanks for the good video. I suffered for several years with a constant rich running 40ELRQ (1992). I bought a spare carb set and finally disassembled the 1sst gen prime start. Big surprise when realized that the diaphragm (part 41) had become an uncoated nylon screen allowing a constant fuel flow into the crankcase. The cause almost certainly was 10% alcohol in an engine of this generation. New pt 41 and a gasket or 2 made the engine run like new. Part throttle fuel economy has almost doubled.
Dude, THANK YOU so much!! My Yamaha 50 TLR would start, hit low idle, then die. It was driving me nuts. After I saw your video, I replaced the diaphragm (41), both gaskets (42) since I was in the area, I figured I would put in a new set, and that dang O-Ring (40). My motor is a 2007 and that O-Ring was hard as a rock and shiny, it was actually hard to see because it took the shape of the Reed valve diaphragm thing it was on. As a matter of fact, the O-Ring broke getting it out. I put on the new O-Ring and put everything back together. Probably a 20 minute job. My engine starts and runs perfectly. The Prime Start hasn't worked this good since 2007 and I keep an extra O ring in my parts now if it ever acts up again. Thank you for helping me out! YAMAHA Part # 67F-14398-20 $5.00 Eberlin Marine in Herman MO
Hello, i have a yamaha 60F 2 stroke and i thing i have more consumption than normal, not only on its way, also at idle . The engine has also difficult cold start(starts only with the red valve enrichment) so i am planning to change the o-ring and the solenoid to the prime start. The boat is ok (weight distribution, normal weight e.t.c.) . What should i do so i dismiss the idea of the more consumption? in my plans are also to put a new carburetor repair kit. Thanks a lot!
My yamaha 50 2004 has that problem... i guess they hired a laid off NASA rocket scientist to redesign the old tried and true manual choke and tried to make our lives easier?
Thanks for the good video. I suffered for several years with a constant rich running 40ELRQ (1992). I bought a spare carb set and finally disassembled the 1sst gen prime start. Big surprise when realized that the diaphragm (part 41) had become an uncoated nylon screen allowing a constant fuel flow into the crankcase. The cause almost certainly was 10% alcohol in an engine of this generation. New pt 41 and a gasket or 2 made the engine run like new. Part throttle fuel economy has almost doubled.
Dude, THANK YOU so much!! My Yamaha 50 TLR would start, hit low idle, then die. It was driving me nuts. After I saw your video, I replaced the diaphragm (41), both gaskets (42) since I was in the area, I figured I would put in a new set, and that dang O-Ring (40). My motor is a 2007 and that O-Ring was hard as a rock and shiny, it was actually hard to see because it took the shape of the Reed valve diaphragm thing it was on. As a matter of fact, the O-Ring broke getting it out. I put on the new O-Ring and put everything back together. Probably a 20 minute job. My engine starts and runs perfectly. The Prime Start hasn't worked this good since 2007 and I keep an extra O ring in my parts now if it ever acts up again. Thank you for helping me out!
YAMAHA Part # 67F-14398-20 $5.00 Eberlin Marine in Herman MO
Thankyou so much mate! have tried absolutely everything and this was the problem! $5 oring was letting fuel into the crankcase
Where did you get the oring ? Having the same problem but not finding the oring.
@@ismaelmolina5781 bought it from Yamaha dealer
Worked for me. Appreciate the good info!
Hello, i have a yamaha 60F 2 stroke and i thing i have more consumption than normal, not only on its way, also at idle . The engine has also difficult cold start(starts only with the red valve enrichment) so i am planning to change the o-ring and the solenoid to the prime start. The boat is ok (weight distribution, normal weight e.t.c.) . What should i do so i dismiss the idea of the more consumption? in my plans are also to put a new carburetor repair kit. Thanks a lot!
My yamaha 50 2004 has that problem... i guess they hired a laid off NASA rocket scientist to redesign the old tried and true manual choke and tried to make our lives easier?