18hp B&S model 422457

r4etired · 01-25-2009, 05:00 PM

Are the valves adjustable on this engine, if so is there a site I can get info on it. model 422457,Type 1209 01 Code 88111412. Thanks Clem

MrChooks · 01-25-2009, 05:33 PM

Hi r4etired & welcome to TSF.

Yes - the valves will be adjustable.

The clearances / tolerances are usually in the engine owners manual, but if you can't find your's, here is a link to the B&S site from where you should be able to down load the specs

http://www.briggsandstratton.com/mai...nual_and_more/

Good luck with it all

k2skier · 01-26-2009, 04:43 PM

Not like on an OHV. Your model number doesn't seem to come up? If it's an opposed twin you have to pull the cylinder head, remove the valve so you can stem the valve, (cut the bottom off) to get more clearance. If there's too much clearance you need to grind the seat and or face the valve. It's old scholl solid lifters on an opposed twin.

01-25-2009, 05:00 PM	#1 (permalink)
r4etired Registered User Join Date: Jan 2009 Posts: 3 OS: Vista	18hp B&S model 422457 Are the valves adjustable on this engine, if so is there a site I can get info on it. model 422457,Type 1209 01 Code 88111412. Thanks Clem

01-25-2009, 05:33 PM	#2 (permalink)
MrChooks Gearhead Join Date: Apr 2008 Location: Sydney, Australia Posts: 613 OS: Windows XP Home SP 3 My System	Re: 18hp B&S model 422457 Hi r4etired & welcome to TSF. Yes - the valves will be adjustable. The clearances / tolerances are usually in the engine owners manual, but if you can't find your's, here is a link to the B&S site from where you should be able to down load the specs http://www.briggsandstratton.com/mai...nual_and_more/ Good luck with it all

01-26-2009, 04:43 PM	#3 (permalink)
k2skier Registered User Join Date: Sep 2008 Location: Oregon Posts: 313 OS: XP Home-SP3 My System	Re: 18hp B&S model 422457 Not like on an OHV. Your model number doesn't seem to come up? If it's an opposed twin you have to pull the cylinder head, remove the valve so you can stem the valve, (cut the bottom off) to get more clearance. If there's too much clearance you need to grind the seat and or face the valve. It's old scholl solid lifters on an opposed twin.