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SC Joe · May 22, 2012, 08:43 AM

I have a Briggs model 28Q777-0678-E1 Code 990215Z.

My initial problem was absolutely no fuel getting into the crankcase. I have installed (at the advice of the parts house in piece meal fashion) a new Walbro carburetor with solenoid for anti backfire (p# 698782), fuel pump (p# 808658), o-ring seals at intake manifold to engine (p# 692138), air cleaner base to carb. (p# 69191), breather gasket (p# 27803S), andbgasket at intake manifold to carburetor (p# 692137).

My current problem is that fuel is absolutely pouring through the breather tube (part #691328) into the carburetor. The engine begins to start but is flooded out when the fuel gushes (no exaggeration) into the carb. I can take the spark plug out and it blows fuel out a good 5 feet.

I have not installed a new breather assembly (p#696126) but I did take the current one apart and cleaned it with carburetor cleaner and blew through it. When I opened the casing there was an inlet for the fuel and a diaphragm type gasket (?) which I assume is an oil inlet and a piece of open cellular foam. It was hard to open and it suddenly popped open and the foam piece fell out. I am uncertain where the foam should actually be placed (I placed over the diaphragm). Could it be that something else may have flown/fell out that I did not notice?

Do you think it is possibly the breather assembly? I am on SS disability and can't afford to keep spending $ on things that will not fix it and all advice will be appreciated.

Additionally would I need to change the oil and filter because of this? The engine has been run less than 5 hours before the above

Thank you

Joe E.

smoothy · May 22, 2012, 09:48 AM

Originally Posted by SC Joe

I have a Briggs model 28Q777-0678-E1 Code 990215Z.

My initial problem was absolutely no fuel getting into the crankcase. I have installed (at the advice of the parts house in piece meal fashion) a new Walbro carburetor with solenoid for anti backfire (p# 698782), fuel pump (p# 808658), o-ring seals at intake manifold to engine (p# 692138), air cleaner base to carb. (p# 69191), breather gasket (p# 27803S), andbgasket at intake manifold to carburetor (p# 692137).

My current problem is that fuel is absolutely pouring through the breather tube (part #691328) into the carburetor. The engine begins to start but is flooded out when the fuel gushes (no exaggeration) into the carb. I can take the spark plug out and it blows fuel out a good 5 feet.

I have not installed a new breather assembly (p#696126) but I did take the current one apart and cleaned it with carburetor cleaner and blew through it. When I opened the casing there was an inlet for the fuel and a diaphragm type gasket (?) which I assume is an oil inlet and a piece of open cellular foam. It was hard to open and it suddenly popped open and the foam piece fell out. I am uncertain where the foam should actually be placed (I placed over the diaphragm). Could it be that something else may have flown/fell out that I did not notice?

Do you think it is possibly the breather assembly? I am on SS disability and can't afford to keep spending $ on things that will not fix it and all advice will be appreciated.

Additionally would I need to change the oil and filter because of this? The engine has been run less than 5 hours before the above

Thank you

Joe E.

Fuel should NEVER... EVER be in the crankcase. And if it is, then obviously you MUST change the oil and filter. Or you will be changing the engine very, very soon.

Gasoline makes a VERY poor lubricant, and actually it doesn't lubricate at all, and that applys to diluted oil.

I don't have a book on Briggs engines but that is advice that is universal in nature... someone else will answer with model specific information shortly.

SC Joe · May 22, 2012, 11:02 AM

Thank you for the quck reply and answer.

Joe

crigby · Jun 30, 2012, 08:53 PM

Hi,
Well, you may have not needed a breather before, but the air has probably ruined it, I doubt you needed all those parts, but you have them. Sounds like you have a piece of trash in the needle and seat of that new car. Always start with the cheapest parts first, i.e. the fuel filter.
Peace,
Clarke
PS Clean the new carb.