biederboat
Petty Officer 3rd Class
- Joined
- Feb 13, 2005
- Messages
- 83
Hello,<br /><br />I recently acquired a 1988 DT140. It supposedly just had dirty carbs as the previous owner ran a tank dry and pulled in a bunch of fowl gas. I cleaned out the carbs which were pretty gunked up in the bowls. Compression is fine (135 all cyls).<br /><br />I had the motor started and running in the driveway and it sounded okay with the exception that it appeared to not have spark on occaision. I suspect the blue/red wire coming out of the elec. module that is grounded at the ignition switch (to stop the motor) may have an intermittent short to ground (either a bare wire rubbing or bad ign. swtich).<br /><br />Today I took it out on the water and it started okay but when I took off at first it was ready to go like a scalded dog I (for a second) but then immediately cut back on power, ran for about 15 seconds, and then stalled. Got it started again with one more short burst of power (never up to full speed) then ran crappy again and finally stalled. <br /><br />In my experience, not running at full power has either been a clogged carburetor jet or bad spark at one cylinder. Can it be anything else (e.g. overall weak spark, bad fuel pump)? I tried pumping the fuel bulb but that didn't change anything.<br /><br />I appreciate any assistance you can give me,<br />Biederboat