Question about Sport & Outdoor - Others
We have a 40hp 2 stroke Yamaha engine on our boat. It ran great then it started to run rough when we would increase the throttle. It was intermittent at first, now it is all the time. We changed the plugs, new gas filter,carburtor was taken off cleaned and adjusted . It worked great for about 20 minutes then we shut down and anchored. When we were off on our way again it started all over. Could this be an electrical problem.
Sounds like a spark plug issue. If the spark plug is not torqued after a good number of months it can seep at high rev sustained pressure. Otherwise I would look at the spark compensator or possibly the float.
Posted on Jan 02, 2010
Hello, It could be ele. If you have ran cheap fuel in it and it has sit for a while, I would clean gas tank,lines, carb again, and run prem gas in tank.
Posted on Nov 25, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
I have exactly the same problem with my Yamaha F100, have you got any solutions yet?
Apr 11, 2011 | Sport & Outdoor - Others
Mar 25, 2011 | Sport & Outdoor - Others
Nov 23, 2009 | Sport & Outdoor - Others
Oct 26, 2009 | Sport & Outdoor - Others
Jul 06, 2009 | Sport & Outdoor - Others
Jun 23, 2009 | Sport & Outdoor - Others
Apr 25, 2009 | kawasaki Full Suspension Mountain Bike Men
Apr 12, 2009 | Sport & Outdoor - Others
Aug 25, 2008 | Sport & Outdoor - Others
Jan 17, 2017 | Sport & Outdoor - Others
325 people viewed this question
Usually answered in minutes!