iammarcuse
Petty Officer 2nd Class
- Joined
- Oct 15, 2007
- Messages
- 131
I have a 1990 PROV150LD. It idles poorly and stalls and will not make full power under way. Sometimes it runs better than others and but always surges even if running better. I have run through most troubleshooting procedures. Compression 95-100. Good spark, new plugs, good fuel pressure, new lift pumps and filter. Thoroughly cleaned carbs. No obstructions. Floats set to spec. Pilot screws set to spec. Carbs synced.
Ruling out electrical and fuel, I am beginning to think that the problem lies deeper, as in reeds. The reason being the middle carbs at idle seem to be breathing very hard compared to top or bottom (which barely have any air movement when you put your hand over them while running.) The motor has a muffled sound while idling and does not sound clear like it used to run. I am open to suggestions. Not sure what to do next. Thanks.
Ruling out electrical and fuel, I am beginning to think that the problem lies deeper, as in reeds. The reason being the middle carbs at idle seem to be breathing very hard compared to top or bottom (which barely have any air movement when you put your hand over them while running.) The motor has a muffled sound while idling and does not sound clear like it used to run. I am open to suggestions. Not sure what to do next. Thanks.