mase

Yes I ordered two overhall kits from SBT.

www.sbtontheweb.com

Mase

Just to update what I found durning the carb rebuild. There was a sand like substance blocking 80% of the fuel filters in the carbs.

Did the rebuild and all works but have the final water test this weekend.

Mase

Just a post to let anyone know the final resolution.

The Carb rebuild took care of the problem and now the engine will go to 6,000 rpm without any problem.

Have 10 hours on the rebuild and no fouled plugs!!!

Just to update what I found durning the carb rebuild. There was a sand like substance blocking 80% of the fuel filters in the carbs.

Did the rebuild and all works but have the final water test this weekend.

Mase

Did you look in intake grate area?

Plastic bag would be my bet.

Are you testing this on the water or just running it on the trailer? I think there is a rev limiter switch when it's in neutral, need to be in Forward to get them to rev properly. If you are running on water then how old is the gas? I would run Seafoam thru the system just too make sure you're carb isn't gummed up. Besides it's always good to run some fuel stabilizer/cleaner at the start of the season anyways. As for the Rave valves...it's a good idea to take them apart and clean the guillotines/ diaphram and exhaust port, they will most likely have carbon build up. Generally if the rave valves are stuck you will only loose 500 or so rpm.


Hope this helps

Keep us posted.

This is running on the water.

The gas is fresh.

For a while the max rpm's were not an issue it ran at like 6,000 then it dropped back to the 4500.

From a full stop to fast start the engine will rev up to like 6,000 rpm very briefly and then cut back to 4500. Full throttle it hangs at 4500. No surging just 4500. When I changed the plugs it seemed to work at max rpms for about 15 minutes. However I changed the plugs again and no effect on the 4500 rpm.

The engine is actualy the 657 model.

Just want to know where to look.

Thanks,

Mase