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I have an older poulan pro 18 hp ohv.kohler engine. Tried adjusting throttle linkage to get more rpm. the throttle /carburator linkage plate has adjustment also. In what order do you start adustments

Not positive on year of mower but within a year or two. started messing with linkage plate and idle screws on side plate and not sure where to start the adjustments to tune carb.

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The Kohler is design for 3600 Max rpm with it developing peak torque at 2200 rpm 42.5 N·m (31.4 ft. lb.)

If your trying to go above the 3600 rpm then your only risking damaging the engine plus causing unnessary wear and tear on it.

Posted on Apr 01, 2015


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SOURCE: 17 hp poulan mower 42" deck wont start

Recheck the valve lash sometimes they are set too tight. Do a compression test if the valve are set ok. If it indicated lower than 80 psi it may be a burn out valve.

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SOURCE: Kohler engine carburetor adjustment on John Deere Model 112

When u adj a kohler carb you adj fuel not air. Always adj the high speed then low speed. Then adj the curb idle. 1.5 turns out is a good starting point. Then tweak it after its warmed up. Hope this helps

Posted on Nov 20, 2009

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SOURCE: I have a Snapper yard cruiser with a 15HP Kohler

Correct that there are no adjustments, but try cleaning the carb jets first, as many times a small amount of debris in the fuel can cause a performance problem. A replacement carb will be close to $200, and NO carbs will be adjustable. A gasket kit is available if you need. Contact your local Briggs dealer to procure the part.

Try cleaning the jets first.
Fuel Starvation - Float Bowl Carburetor
1) remove air filter assembly
*be cautious of tearing the mounting gasket. If it does tear, you HAVE to replace it. It is part of the priming system
2) remove the float bowl fastener. This is the main jet
3) carefully remove the float bowl, the rubber o-ring/gasket will not be able to be used if it is removed, you WILL have to replace it
4) using a spray 'carb cleaner'
spray up thru the center of the carburetor
spray and clean the main jet with cleaner and 'tag' wire
(tag wire is very thin, and can be used to clean the hole in the center of the main jet)
5) clean any debris from inside the bowl or carb body
6) re-install bowl and center bolt, air filter assembly

*if you need gaskets, your Briggs dealer can supply. The kit is cheaper than individual gaskets, and all the parts needed to finish the above repair are in the kit.

I’m happy to assist further over the phone at

Posted on Nov 21, 2009

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check that throttle linkage is ok and free, check that throttle plate is free to move and not jammed - check that srew in the throttle plate is not allowing plate to restrict and jamb throttle

check the governor springs and links are in the correct places and are free to move , check that governor is working ?

if its not migght be governor is adjusted wrong or slipped
or its flown to peices

if unit is ohv model have seen the the ocilating balancer
torque link rod break and cause a engine to go to full throttle
as sson aas the engine was started

please let me know model and type numbers off the engine in question and its make ie briggs etc

and will try help further

cheers paul

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