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I want to adjust the valves but can't find the specs.

#1

L

louky1150

I got a used John Deere pressure washer with a John Deere "badged" engine. It is an OHV 250cc horizontal engine with 11.5 on the cover but this is supposed to be torque and not hp. I am just about positive is an Briggs engine. Number is

150212-0126-B8.​

I can't find the specs for the valve lash on the internet using this number to search. Does anyone have this info or can point me to where to find it?

Thanks in advance.


#2

I

ILENGINE

intake .004-.006 exhaust .009-.011


#3

H

hlw49

intake .003 to .005 and exhaust .005 to.007


#4

Scrubcadet10

Scrubcadet10

Page 10 Briggs owners manual
Intake Valve Clearance .004 - .006 in (,10 - ,15 mm)
Exhaust Valve Clearance .009 - .011 in (,23 - ,28 mm)


#5

I

ILENGINE

hlw49 said:
intake .003 to .005 and exhaust .005 to.007
Click to expand...
Normally correct but not for this engine.


#6

H

hlw49

ILENGINE said:
Normally correct but not for this engine.
Click to expand...
Not what the repair manual says.


#7

Scrubcadet10

Scrubcadet10

See if you can find a publish date on the repair manual and I'll look for a date on the owners manual. maybe they changed it for some reason.


#8

I

ILENGINE

hlw49 said:
Not what the repair manual says.
Click to expand...
page 156 of the 276781 single cylinder OHV service manual shows .004-.006 for intake and .009-.011 for exhaust. Also those are the specs that are listed when doing the model search with the Dealer site. Also listed in the owners manual for that engine as @Scrubcadet10 listed.

page 159 of the following PDF

www.manualslib.com

Model 150000 Horizontal Series - Briggs & Stratton 276781 Instruction Manual [Page 159]

Briggs & Stratton 276781 Manual Online: Model 150000 Horizontal Series. ENGINE SPECIFICATIONS Armature Air Gap Crankshaft End Play Spark Plug Gap Valve Clearance – Intake Valve Clearance – Exhaust FASTENER TORQUE SPECIFICATIONS Air Cleaner Base / Backplate Armature Blower Housing...
www.manualslib.com www.manualslib.com


#9

L

louky1150

Thanks for the replies and especially the links, which I have saved. I got into this today, both intake and exhaust were quite a bit larger than specified. I adjusted them to .005 and .010. The motor started on the first pull and seems to be running a little smoother. (Maybe my imagination though).


#10

S

slomo

Capture.PNG


#11

H

hlw49

I see this is the first OHV engine I have seen with that big a valve lash.


#12

I

ILENGINE

Looks like the 11xxxx, 12xxxx, and 15xxxx series engines all use that exhaust gap. the 20xxxx and 21xxxx are more normal .004-.006


#13

H

hlw49

The 110000 and 120000 Professional series engine call for .004-.008 intake and exhaust. Go figure.


#14

I

ILENGINE

@hlw49 Doesn't seem like there is a rhyme or reason in some of the numbers Was just looking at some other engines and the 10R series is .004-.006 intake and .006-.008 exhaust but the 10U series is .005-.007 for intake and exhaust


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