225 carb.merc blowing off bleed lines

[dbduts]

I have 1996 225 merc that would not go over 2200rpms. check coils tps crank senser. replced reed valve it spits out carb at 2200 rpm and blows off middle cylinder bleed line. i wire tied them on but then it justs melts it i check the head gaskets and replaced them help me i spent $800 on it last year don't trust repair man problem came back

 

[heybaylor]

Re: 225 carb.merc blowing off bleed lines

hole in piston ?? busted rings? did you do a compression check ?

 

[dbduts]

Re: 225 carb.merc blowing off bleed lines

i did a comp test 105-110 across the board.

 

[heybaylor]

Re: 225 carb.merc blowing off bleed lines

check the bleed valve that line blows off..<br />it has a one way check ball in it .<br />i/e you should be able to suck air out , but not blow it back in ..<br />pull line from cylinder fitting ( barb) ..and check .

 

[dbduts]

Re: 225 carb.merc blowing off bleed lines

i checked the valves ok it only blows the lines off at about 2000rpm.ichecked and cleaned the carbs took them apart looked cleanstill confused

 

[heybaylor]

Re: 225 carb.merc blowing off bleed lines

the piston goes up toward the head ,create's vacume in the crank case ..reed opens ,allows fuel mixture in through carb. fill crankcase with mix..piston goes down..creates pressure in crankcase ..close's reed ... pressure forces mix through transfer port in cylinder..to top of piston..<br />this same pressure forces the "puddle" of mixture where the bleed valve is located..the line carries this "puddle to the intake port where it is burned ..<br /><br />hmmm...only thing that would "blow line off" is a partially clogged/clogged intake port ..and or barb fitting on intake port..<br />the fact that it is spitting out of carb is usually a leaking reed valve