I recently acquired a pontoon boat with e 97 mercury Force 75 Boat motor. The original issue was the motor would not idle. I have done all kinds of things to this motor and it appears it won't even run at all now. Below are all the items I have done and the result.
Motor SN: 0E260622
Model: 1997 75 ELPT
- Changed the plugs: No difference in running
- Removed the carburetor and replaced a few parts, then completely soaked it in Seafood for 48 hours: seemed to run a little smoother, but still would not idle, even with adjustment
- Replaced Fuel tank, fuel line, and fuel filter: No difference
- Tested compression in all cylinders, they were all good (~110)
- Replaced Fuel Pump: It got worse, instead of trying idle, it would start run for one second and then die, it didn't even spit and sputter like it used to.
- Rebuild the old fuel pump: Did the same as the new, made it worse Would start up and die right away.
So of interesting note, When I rebuilt the fuel pump, the old rubber flanges were torn and worn out (both of them), The replacements were solid (no holes as expected). It at least ran a little bit with the torn rubber flanges.
Just before it dies, if I choke it, it will speed back up, and within 2-3 second dies out. I have posted links to 2 video, one of it starting and dying,
http://www.udsgroup.org/application/video/Boat Engine - Stall.mp4
and the other where I choke it to keep it running.
http://www.udsgroup.org/application/video/Boat Motot - Choking.mp4
It sounds like it fuel related, but I just can't pinpoint where the issue may be. I am running out of idea on what could be causing the issue, any help would be greatly appreciated
Thank you!
Motor SN: 0E260622
Model: 1997 75 ELPT
- Changed the plugs: No difference in running
- Removed the carburetor and replaced a few parts, then completely soaked it in Seafood for 48 hours: seemed to run a little smoother, but still would not idle, even with adjustment
- Replaced Fuel tank, fuel line, and fuel filter: No difference
- Tested compression in all cylinders, they were all good (~110)
- Replaced Fuel Pump: It got worse, instead of trying idle, it would start run for one second and then die, it didn't even spit and sputter like it used to.
- Rebuild the old fuel pump: Did the same as the new, made it worse Would start up and die right away.
So of interesting note, When I rebuilt the fuel pump, the old rubber flanges were torn and worn out (both of them), The replacements were solid (no holes as expected). It at least ran a little bit with the torn rubber flanges.
Just before it dies, if I choke it, it will speed back up, and within 2-3 second dies out. I have posted links to 2 video, one of it starting and dying,
http://www.udsgroup.org/application/video/Boat Engine - Stall.mp4
and the other where I choke it to keep it running.
http://www.udsgroup.org/application/video/Boat Motot - Choking.mp4
It sounds like it fuel related, but I just can't pinpoint where the issue may be. I am running out of idea on what could be causing the issue, any help would be greatly appreciated
Thank you!