My 1994 gtx has no power and will not even begin to get up on plane in the water. It starts and revs pretty freely on the trailer. I have all new fuel lines, fuel strainer and selector valve bypassed with a line running from reserve port, it sucks fuel right up to the carbs (I have a clear piece of line on the supply), the previous owner claimed he rebuilt the carbs and he gave me mikuni boxes with spare parts so I’m assuming he used those. I also opened them up and they looked fairly clean. It has about 145 psi of compression on each cylinder. It will idle around and move about 5mph in the water but if I try to go past 1/4 throttle it wants to bog and die. It has about a 3/16 hole in the muffler, only found this because I had a couple inches of water in the bottom of the hull. I figured this probably wouldn’t cause my lack of power though. I just replaced the spark plugs as well. I would appreciate any advice.
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No power/acceleration in the water
- Thread starter Alexh886
- Start date
There’s a hole in the water box. Water is coming out of it. I assume that means exhaust is as well
Rotary valve cover clearance is .018+. That would explain it, correct?
My 94 gtx doesn’t accelerate or have power in the water. The manual says it’s not supposed to have more than .014” of rotary valve cover clearance. I got up to .018” and stopped there. The cover looks terrible. I’ve seen all sorts of answers about what the clearance should be and how supposedly measuring through the ports is inaccurate. There must be a reason the manual gives that spec, but I’m looking for actual empirical evidence of what level of wear will cause the issue I’m having. Thank you.
yes 100%
