johnny whaler
Seaman
- Joined
- Sep 4, 2006
- Messages
- 56
I have a 1994 Yamaha 70 2 stroke I just bought on a 15' whaler. The guy I got it from was a straight shooter and told me he had it out yesterday and the boat ran great. He offered a sea trial and we just started it in his driveway with the muffs. It ran great.
I took it to the ramp today and it runs great until you put it in gear. It has no power! I ran a compression test and the 2 top cyls were dead even at 140 and the bottom was 130. (my tester is off a little - I doubt it's this high). I have great spark. I even pulled the plug wires off 2 at a time and it will run on one of the 3 cyls. It actually ran on each one all alone.
The control box is shot and there is a red lever inside betwen the carbs and the oil tank you need to flip up manually to start it. I guess it's the choke? But there is no choke flap on any of the carbs? I turned the lever all the way around and it fired up instantly. It will idle all day long and you can rev it up with the warm up lever but when you put it in gear it's a dog and then dies. It will start right back up again.
I am led to believe there is something shot in the control box. He did tell me it was repaired a few times and it could use a new one. The choke button does not work.
Any ideas? I have great spark, compression, seems to be getting fuel? Any help is appreciated.
I took it to the ramp today and it runs great until you put it in gear. It has no power! I ran a compression test and the 2 top cyls were dead even at 140 and the bottom was 130. (my tester is off a little - I doubt it's this high). I have great spark. I even pulled the plug wires off 2 at a time and it will run on one of the 3 cyls. It actually ran on each one all alone.
The control box is shot and there is a red lever inside betwen the carbs and the oil tank you need to flip up manually to start it. I guess it's the choke? But there is no choke flap on any of the carbs? I turned the lever all the way around and it fired up instantly. It will idle all day long and you can rev it up with the warm up lever but when you put it in gear it's a dog and then dies. It will start right back up again.
I am led to believe there is something shot in the control box. He did tell me it was repaired a few times and it could use a new one. The choke button does not work.
Any ideas? I have great spark, compression, seems to be getting fuel? Any help is appreciated.