Hello, I'm new here and just got a 1977 Chrysler 135 for my boat. I'm having some problems with it. when I start it it idle's rough and it doesn't hit max rpm at WOT. it act's like it has a dead cyl (1 & 2) adjusting the air screw on the top carb does little to nothing. if i put my hand over the carb it will do little to the rpm's. even if i spray carb cleaner into the top carb it does little to nothing. if i did the same as i did to the top carb to the bottom carb it will kill the motor. also some times it will back fire and die. My spark on all 4 plugs is great. I'm getting gas and it's getting plenty of air
things I have already done
compression is 125 125 125 130
new plugs
new impeller
cleaned carbs, air screws @ 1 1/8
cleaned, flushed fuel tank and put in new gas and oil
cleaned fuel filter
checked firing order 1324 and TDC the motor (everything was dead on)
any help would be awesome. we are hoping to take it out this weekend if i can get this problem fixed.
thanks,
Steve
things I have already done
compression is 125 125 125 130
new plugs
new impeller
cleaned carbs, air screws @ 1 1/8
cleaned, flushed fuel tank and put in new gas and oil
cleaned fuel filter
checked firing order 1324 and TDC the motor (everything was dead on)
any help would be awesome. we are hoping to take it out this weekend if i can get this problem fixed.
thanks,
Steve
