Blower leaking Fuel!

[Firebird!]

Hey guys - got that problem with my Yardman Blower. Wanna see if you can help me figure out a problem.

This is a YardMan YM320BV Blower/Vacuum with Walbro WT-682 Carb. It is about 4.5 years old.

I've noticed the leaking fuel after I work with the unit, so I replaced the fuel lines and still getting the leaks (the air filter getting soaked and the metal plate below the air intake hole is all in fuel)(Pic 1) (http://i114.photobucket.com/albums/n248/OFilippov/Dont%20look/100_4334.jpg). I've tried to run it without the back attached and seen fuel sparkles flying out from the intake hole. Also I've noticed that there is no high speed screw in it. So I thougt that it is missing and after a closer look it looks like the high speed hole been plugged in at the manufacture(Pic2) (http://i114.photobucket.com/albums/n248/OFilippov/Dont%20look/100_4333.jpg).

So can you guys help me figure out where is the problem?

http://s114.photobucket.com/albums/n248/OFilippov/Dont%20look/th_100_4334.jpg (http://i114.photobucket.com/albums/n248/OFilippov/Dont%20look/100_4334.jpg) http://s114.photobucket.com/albums/n248/OFilippov/Dont%20look/th_100_4333.jpg (http://i114.photobucket.com/albums/n248/OFilippov/Dont%20look/100_4333.jpg)

[echoman8]

Hi,

I held off on this thinking someone else with more experience would jump in and solve it for you.

Myself, I bet this blower has a reed valve. I bet the reed valve has some trash in the edge (corner) of it.

To see if it has a reed valve, remove the carb and look through the manifold (hole to crankcase). If you see the hole blocked with a shiny chrome thing, then remove it and see if some trash is in the corner of it leaving the reed valve slightly open. If the reed valve is slightly open without trash in the corner, then change the reed valve.

On some older models, this was common especially with foam air filters.

I can't think of any condition that would cause spitback and still allow the blower to run well except a poorly sealing reed valve.

Good luck,
echoman

[MowerMedic77]

Any chance you have a clogged muffler, the last one of these I fixed was spitting fuel and had no power because the exhaust had no place else to go from the plugged up muffler.

[Firebird!]

Thanks guys - I will check on those

[echoman8]

Any chance you have a clogged muffler, the last one of these I fixed was spitting fuel and had no power because the exhaust had no place else to go from the plugged up muffler.

GOOD CALL MowerMedic. Sometimes I think I am going braindead. Although the stopped up exhaust will change the performance, it comes on over such a long time that it is not so noticeable.

echoman

[pdoetsch55]

check sparkscreen and make sure exhaust port is clean too. also, check intake side of piston for scoring, this can cause terrific spitback and create a "leak"

[mowerknower]

Possible things, leaky needle, plugged exhaust, bad reed valve, warn piston skirt. Just dont put too much time or money into this machine. Probably only has a 75-100hour engine rating

[salvagedrover]

yeah i was thinking about skirt washing. damned ethanol!!!