mr nice

Sorry, antoher Briggs & Stratton problem. My ride on will not start 3 years old brough new.
Turn starter key, sounds like flat battery turns very slow maybe 1 time.
I replaced battery - same thing.
Tried with jumpers - same thing.
cleaned air filter, fuel filter - same thing.
repaced spark plug - same thing.
when spark pug was out - turned over very easily.
Sort of sound like too much compression? Exhaust Valve?
Is this something I can fix myself or is it off to the shop? Could a good spary of WD40 down the spark plug hole (and then replace) free it up.

Cheers Paul

mstpops

given your ruling out of things - i suspect that you may have a valve clearance problem or a bent push rod

to set valve clearance run piston to tdc compression stroke then go past tdc by 1/4 of an inch or 6.35 mm down the bore on power stroke and set the intake valve to 0.003" ( this valve is the lower one ) and is alloy and exhaust to 0.005 " ( this is the upper one and is steel)

make sure this does not have a blowen head gasket these ohv are famous for it - leakdown test it - if the inside of the air cleaner is wet with a light coating of oil this has come from the breather

also check that the starter motor has a good ground and the regulator rectifier is grounded to the metal straps on the starter motor bracket

this assumes that spark loaded / un loaded test was good and good fuel supply and compression ok


hope this helps let me know mstpops

K-B

I would agree, there's a good possibility that valve clearance is off.

Anther possibility is a bad ground wire.

mr nice

Thanks boys, I've has a chat with the local "mower man" and his quick prognosis was - valve service. I do not have all of the bits and piece to do the job (and it would probably take me days not hours) so it's off to the shop. I will let you know the outcome and the bill in a couple of days.

K-B

Yes, please keep us updated, I'm interested to know if that's what the problem turns out to be.