canyonken
Seaman
- Joined
- Jun 23, 2008
- Messages
- 58
1996 SeaRay 175XL with the 4.3 liter v6 genII+. 2 barrel mercarb. Thunderbolt IV ignition.
I recently changed all plugs, new cap/rotor and new plug wires. Gas (10 percent ethanol) is no older than 5 weeks old.
Boat starts great. It seems to have trouble with rough idle and sporadic RPMs and a few stray backfires when trying to idle around the marina or no wake zone. Anywhere from 600 to 1200 RPM range. You have to stay on the throttle to keep it from stalling now and then. Once you give it a good amount of throttle and get up on plane - it runs perfect. No problems. Engine runs real smooth at this point. I run it at 3000 RPM - it can go all day with no real problem. Back off throttle and idle round and it seems to run rougher and backfires every now and then. Any help ??
I recently changed all plugs, new cap/rotor and new plug wires. Gas (10 percent ethanol) is no older than 5 weeks old.
Boat starts great. It seems to have trouble with rough idle and sporadic RPMs and a few stray backfires when trying to idle around the marina or no wake zone. Anywhere from 600 to 1200 RPM range. You have to stay on the throttle to keep it from stalling now and then. Once you give it a good amount of throttle and get up on plane - it runs perfect. No problems. Engine runs real smooth at this point. I run it at 3000 RPM - it can go all day with no real problem. Back off throttle and idle round and it seems to run rougher and backfires every now and then. Any help ??