water problem
07-09-2007, 07:56 PM
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water problem
I have a 1990 27ft pachange 454 and have a revertion problem only when I'm at an idle. I run a river between two lakes that takes an hour each way to get through and only suck water back into the engine when I idle in the no wake zone. My cam duration is 218 - 224 so I don't think thats the problem. I have a stock exhaust which is the two water filled mufflers on each side of the boat. I really need some help on this one ,It's getting expensive.
07-10-2007, 09:16 PM
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water problem
Well Darrell, I always keep all my paper work for anything I buy for my boat in a file except this invoice I guess. I will need to look some more. I do know it is a automotive cam with a duration of 218-224.
07-11-2007, 10:40 AM
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This took my motor out. Swapped to dry exhaust so I will never have to worry again. The new headers and pipes were a bit expesive but if I had done this before it would have been a bargain compared to the rebuild and new heads. Dry pipes are REAL loud so if you area will not allow or you don't want to deal with the noise you can put the clamp on mufflers on the back. Good luck
07-11-2007, 01:49 PM
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You should really look at the exhaust muffler installation. Is it possible that the riser outlets are equal or lower than the muffler inlets when the boat is sitting in the water? If so, water can be backing right up the exhaust hose into the riser. There is not enough exhaust pressure to push the water out of the muffler, so it just accumulates back up the hose into the riser. The riser outlets should be at least 2'+ higher than the inlet to the mufflers.
Good Luck!
Good Luck!
