JimBud
Member
- Messages
- 1
- Reaction score
- 0
- Points
- 20
- Boat Make
- Yamaha
- Year
- 2001
- Boat Model
- LS
- Boat Length
- 19
Has anyone ever solved this issue? I’ve read 100’s of posts with others trying to resolve this, but haven’t found the solution.
Background: I have a 2001 LS 2000 that dropped an oil line and seized. I replaced the engine with a used one that had great compression (119,118,118). During the replacement, I rebuilt the carbs with Mikuni kits, installed new reeds, new fuel filters and lines, pulled the exhaust apart and cleaned them internally, sent the coil packs out and had them checked and new wires and boots installed, installed properly gapped new spark plugs, and installed new oil lines with clamps.
Right from the first startup, both engines fired well and idled properly. Once warmed up, I hit the lake and immediately could tell that the stbd engine was not having the same throttle response as port. Stbd struggled to get up into the power band and would only get there if throttled quickly and with the help of the other motor. Top speed about 46 mph compared to 51 mph before.
Rechecked throttle cable adjustment- still the same.
Swapped fuel supply lines, still the same.
Swapped carbs engine to engine - still the same (not a carb issue)
Tried another set of new plugs - still the same.
If anyone has had this issue and found resolution, please let me know how you got your boat back up to full speed.
Background: I have a 2001 LS 2000 that dropped an oil line and seized. I replaced the engine with a used one that had great compression (119,118,118). During the replacement, I rebuilt the carbs with Mikuni kits, installed new reeds, new fuel filters and lines, pulled the exhaust apart and cleaned them internally, sent the coil packs out and had them checked and new wires and boots installed, installed properly gapped new spark plugs, and installed new oil lines with clamps.
Right from the first startup, both engines fired well and idled properly. Once warmed up, I hit the lake and immediately could tell that the stbd engine was not having the same throttle response as port. Stbd struggled to get up into the power band and would only get there if throttled quickly and with the help of the other motor. Top speed about 46 mph compared to 51 mph before.
Rechecked throttle cable adjustment- still the same.
Swapped fuel supply lines, still the same.
Swapped carbs engine to engine - still the same (not a carb issue)
Tried another set of new plugs - still the same.
If anyone has had this issue and found resolution, please let me know how you got your boat back up to full speed.
