"I have just brought a new 50h
"I have just brought a new 50hp yamaha motor which I put on a 4.2 meter alloy boat. boat only weighs 190 kilos and can only achieve 35 mph top speed at 5500 rpm. They clicked the rev counter wrong so when I was running it in I was doing 6000 rpm instead of 3000. I am not happy about that as the first hour of use was 500 revs more than it should when run in. The motor now has one and a half hours on it, and I took it out the other day to try the new prop and do some fishing. When I moved to another spot I started the engine and went to move off, and it would rev to about 1200 revs then stop. After 5 or 6 attempts of this it got past that rev and seemed to go ok although not great. This happened about 90% of the times when restarted. The motor would start fine and idle fine then with a little throttle, would run as rough as and when trying to increase more it would stop. any ideas??? took it back to the shop and they couldn't find anything wrong with it. Took it out yesterday and it did the same 3 times only. I am concerned about this, and the over revving from new and also the amount of fuel this motor uses. Can anyone help?"
"I have just brought a new 50hp yamaha motor which I put on a 4.2 meter alloy boat. boat only weighs 190 kilos and can only achieve 35 mph top speed at 5500 rpm. They clicked the rev counter wrong so when I was running it in I was doing 6000 rpm instead of 3000. I am not happy about that as the first hour of use was 500 revs more than it should when run in. The motor now has one and a half hours on it, and I took it out the other day to try the new prop and do some fishing. When I moved to another spot I started the engine and went to move off, and it would rev to about 1200 revs then stop. After 5 or 6 attempts of this it got past that rev and seemed to go ok although not great. This happened about 90% of the times when restarted. The motor would start fine and idle fine then with a little throttle, would run as rough as and when trying to increase more it would stop. any ideas??? took it back to the shop and they couldn't find anything wrong with it. Took it out yesterday and it did the same 3 times only. I am concerned about this, and the over revving from new and also the amount of fuel this motor uses. Can anyone help?"