- Location
- Brisbane Australia
I've got an issue that has me stumped. 701 SJ, dual 46 black jacks, Riva Head, R&D wet pipe.
The ski has always been a bit of a pig down low (I just figured its the prop/pipe/carb setup), but once it comes on it hit nice and hard and went well. W
hat started happening, is the ski was taking longer and longer to come 'on pipe' but also somewhat limper and limper power wise once it did. It's now at the point where it wont come on power ('pipe') at all. It starts fine, revs fine out of the water just makes no power. Comp is still ok. The carbs are completely seperate in operation (individual pumps, feeds and pulse lines) so pulling a plug on each cylinder both run exactly the same with the same amount (lack) of power. Neither misses or, stutters etc.
I'm usually pretty good at nutting out issues but the progressiveness of this issue (ie getting worse) has me stumped. I've checked fuel lines, pulse lines, filters etc. But as everything is 100% individual for each carb I don't think it's that.
I'm thinking it's an electrical/electroinc issue. I don't think it's a simple spark issue, spark looks strong, new plugs don't help, and I've had breaking down spark issues before, they didn't symptom like this. Leads are MSD with MSD caps and Clips all fairly new.
I thought it might be timing related but I've got the flywheel off and mechanically the timing is spot on.
Could it be an issue in the Ebox? The over heat stuff has been pulled off eons ago, but maybe it's tripping, or something else? Probably the hardest stuff to dignose is possible ebox issues.
Any ideas would be heaps appreciated, I sort of stuck it away over winter and forgot about it while I had the drity to ride........... now I wanna get it in the water lol.
Cheers.
The ski has always been a bit of a pig down low (I just figured its the prop/pipe/carb setup), but once it comes on it hit nice and hard and went well. W
hat started happening, is the ski was taking longer and longer to come 'on pipe' but also somewhat limper and limper power wise once it did. It's now at the point where it wont come on power ('pipe') at all. It starts fine, revs fine out of the water just makes no power. Comp is still ok. The carbs are completely seperate in operation (individual pumps, feeds and pulse lines) so pulling a plug on each cylinder both run exactly the same with the same amount (lack) of power. Neither misses or, stutters etc.
I'm usually pretty good at nutting out issues but the progressiveness of this issue (ie getting worse) has me stumped. I've checked fuel lines, pulse lines, filters etc. But as everything is 100% individual for each carb I don't think it's that.
I'm thinking it's an electrical/electroinc issue. I don't think it's a simple spark issue, spark looks strong, new plugs don't help, and I've had breaking down spark issues before, they didn't symptom like this. Leads are MSD with MSD caps and Clips all fairly new.
I thought it might be timing related but I've got the flywheel off and mechanically the timing is spot on.
Could it be an issue in the Ebox? The over heat stuff has been pulled off eons ago, but maybe it's tripping, or something else? Probably the hardest stuff to dignose is possible ebox issues.
Any ideas would be heaps appreciated, I sort of stuck it away over winter and forgot about it while I had the drity to ride........... now I wanna get it in the water lol.
Cheers.