Ridley
Member
Good morning folks,
Having an intermittent acceleration problem with my 97 Challenger.
So far I have rebuilt the carbs, genuine mikuni parts and original springs. Followed the excellent step by step guide on here (thank you). Pop off was consistent at 42 on both carbs. Returned high and low screws to the settings they were at:
High: 0 Mag / 1/2 PTO
Low: 1 1/2 Mag and PTO
Cleaned and rebuilt the Raves with new diaphragms and o-rings. Red cap is screwed all the way in on both.
All fuel lines have been replaced, running the fuel selector on reserve doesn't make any difference.
Boat starts and idles fine. Sometimes it will run perfectly especially when first in the water, then sometimes either after fast deceleration, tight turn or sitting with engine off for a while the acceleration problem re-appears.
Boat will get up to about 5-5.5k rpm, just before getting on the plane, and then won't accelerate any higher. Any movement of the throttle beyond about 50% makes no difference to engine speed.
Completely stumped with what to try next, very grateful for any suggestions.
Thanks,
Ridley
Having an intermittent acceleration problem with my 97 Challenger.
So far I have rebuilt the carbs, genuine mikuni parts and original springs. Followed the excellent step by step guide on here (thank you). Pop off was consistent at 42 on both carbs. Returned high and low screws to the settings they were at:
High: 0 Mag / 1/2 PTO
Low: 1 1/2 Mag and PTO
Cleaned and rebuilt the Raves with new diaphragms and o-rings. Red cap is screwed all the way in on both.
All fuel lines have been replaced, running the fuel selector on reserve doesn't make any difference.
Boat starts and idles fine. Sometimes it will run perfectly especially when first in the water, then sometimes either after fast deceleration, tight turn or sitting with engine off for a while the acceleration problem re-appears.
Boat will get up to about 5-5.5k rpm, just before getting on the plane, and then won't accelerate any higher. Any movement of the throttle beyond about 50% makes no difference to engine speed.
Completely stumped with what to try next, very grateful for any suggestions.
Thanks,
Ridley