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Poulan 17.5 hp spins with plug out, but wont with it in or finger over hole? problem accurd after putting gas in

Adjust the valve lash.

bertsmobile1 said:

Adjust the valve lash.

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any DIY Guides? think its .006-.012 ?

leink said:

any DIY Guides? think its .006-.012 ?

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It always improves your chances of the correct information IF YOU give us the info WE need to help YOU ! see EXAMPLE .

prod#960160024 PTX 175G42

ohv info mod.31c707 type 3345g1 code 101008za

https://www.youtube.com/watch?v=8PEUt_KAcYk
your mower will have SILLY-CON on the rocker cover, clean it all off, and use a gasket.
Put some bentonite grease ( smelly brown stuff ) on the engine side so it will strip off easily next time.

thanks bertsmobile1, found stud loose readjusting

thanks bertsmobile1, found stud loose readjusting:thumbsup:

:confused2: having modem problems...........cant see videos..

can anyone walk me thru the steps so i can findout what im doing wrong ? 17.5 hp 31c707 type 3346g1 code101008za ohv :biggrin:

Pull the spark plug and rotate the engine by hand while watching the valves.
Bottom inlet top exhaust.
The inlet will close then open a tiny amount for decompression.
rotate the engine till TDC the go past about 1/4" of piston drop.
The engine is now ready for valve lash adjustment.
It is backwards to what is usual.
The grub screw in the middle is the locking mechanism and the nut is the adjustment.
So loosen off the grub screw, either an Allen screw or a Torx screw.
Turn the outer nut to adjust the gap .
Hold it firm then tighten the grub screw,
Set it tight as when tightening the grub screw the gap tends to close a thou or two .
Run the engine for 10 minutes
Let it get stone cold ( about 2 beers worth ) then recheck.
Grease the gasket when happy with the settings and refit the rocker cover.
If you can not get the engine to crank properly with the gaps set to the tightest setting then the cam is worn & needs to be replaced.
I have run an engine at 0.002" on the inlet but eventually the valve seat let go , which was expected but the owner did not want to have the cam replaced.

:thumbsup: after setting valves more times than i care to count,:confused2: i returned to the basics, and took a closer look.........found intake push rod bent,which prevented a proper adjustment.
started and running fine now! thanks to all:laughing:

leink said:

:thumbsup: after setting valves more times than i care to count,:confused2: i returned to the basics, and took a closer look.........found intake push rod bent,which prevented a proper adjustment.
started and running fine now! thanks to all:laughing:

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Push rod bent and stud loose are classic symptoms of an overheated head causing the alloy to go soft.
If it keeps giving you problems then it is new head time.
make sure you pull the blower cover off at the beginning of each new season & clean around the fins.
Over winter all sots or things seem to mistke your mower for their Hilton ( & I ain't talking Paris )

Yes mice will build a nest in there and cause heating issues..

Where you from Mon Ami. ??????