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I have a lawnboy 10515 1994 leaking mix through the bottom of the deck. I think it might be coming through the muffler via exhaust port. I hope not. if it is whats happening and how to fix. Maybye I'm wrong and it's the bottom seal? any suggestions

Anytime the fuel tank is above the carb, gravity can help force fuel (or in this case fuel "mix") to flow into the engine. This is often assisted by a tiny piece of trash stuck in the carb's float valve.

You should 1) add a manual fuel ON/OFF valve between the carb and fuel tank, and then 2) start using it religiously.

i hahe a shut off on the tank ill try that however it only does it after its been running

Either the carb is flooding or the exhaust port is clogged

ports are not clogged already checked. how does the carb flood i put in new seat and needle and gave it a good cleaning did i overlook something?

Did you drain the crank cases ?
I can open up a Victa and find 1" of mix sitting in the bottom of the cases , even on a mower that has not been used for a long time .

2 cycle you'll ha ve to forgive my ignorance im new to this where is the crank case?

Born2Mow said:

Anytime the fuel tank is above the carb, gravity can help force fuel (or in this case fuel "mix") to flow into the engine. This is often assisted by a tiny piece of trash stuck in the carb's float valve.

You should 1) add a manual fuel ON/OFF valve between the carb and fuel tank, and then 2) start using it religiously.

Click to expand...

I've installed that particular shutoff on both of my 10525's. Works great!

could it be bad piston rings/

earnest t bass said:

How does the carb flood i put in new seat and needle and gave it a good cleaning did i overlook something?

Click to expand...

2 huge holes in your logic...
► Your root assumption is that float needles and seats are perfect and infallible.

► You are also forgetting about GRAVITY, which is on the job 24/7/365. As it has been since it was first discovered in 1679.


PS. I'm fairly sure Newton discovered gravity in 1679, because there were no lawn mower engines reported with "fuel wet sumping" issues before that year.

like your style and i bet your right im gonna fix those things an recheck

i think that worked thx.

Did you look at the float when you removed it, and see if it's holding gas in it because it has a small hole somewhere or at the seam? Did you accurately set the float level ?
Good luck with this..

float looks good

earnest t bass said:

2 cycle you'll ha ve to forgive my ignorance im new to this where is the crank case?

Click to expand...

The crank case is where all internal parts are, piston, connecting rod etc.

thx

I have nine Lawn-Boy 2-stroke mowers ranging from the 70's to the 90's. Every one has a factory fuel shutoff valve as part of the shroud. Are you sure yours doesn't already have a fuel shutoff valve built in?

it does and fortunately ive solved this problem thx.