60 merc idle problems

[huttbassin]

engine would die at idle. checked ball. changed plugs. changed fuel filter. checked fuel pump diaphram. pulled carbs and checked jets and air passages. reassembled. top carb bubbled fuel out of throat area (?). pulled off and tweaked float. ran ok at house , at lake was sluggish out of the hole and at idle after a run would idle then rpms would fluctuate and engine would periodically thump like a cylinder was cutting out. runs fine at cruise and top end. compression 122 top 125 mid 128 lower.fuel prob? vacuum prob? firing prob? auto choke? combination? confussed,need help. p.s. ordered manual.

 

[G DANE]

Re: 60 merc idle problems

Hi<br /><br />I think the faulty carb is either running lean or flooding now, it has to be corrected. Check floater hight on all 3 and adjust to correct level. Ist very important! Flooding as you had, doesnt just mean incorrect floater hight, it can be crud stuck in floater valve too. Check spark plugs right after running 3/4 or more speed continously. Same colour ?

 

[nickster]

Re: 60 merc idle problems

huttbassin!<br /> Welcome to the board. You had said that there is fuel coming from the carbs after you have checked them troughly. That tells me you have bad reeds. Reeds will also efect the way your motor runs and idles. If and when you pull the carbs back out inspect the reeds. If the reeds are bad this is going to call for a tear down of the motor. Now I have seen reeds that look good from looking in the intake but after taking and doing a complete tear town found they were bad.<br /><br /> GOOD LUCK!<br /> NICK