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Changed carbs adjusted valves still the same thing hunts real bad only runs with choke half on. Changed carb head gasket and lapped the babes still hunts an dies without choke on

"Lapped the babes", huh?

Engine model no. ?

Have you reset the governor?

Craftsman Garage said:

Have you reset the governor?

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Yes

Tpieman22 said:

Yes

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I changed the governor when changing the camshaft.

Tpieman22 said:

I changed the governor when changing the camshaft.

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The surging has been going on for couple of years. The new carb did not help either new head gasket too of course

Tpieman22 said:

The surging has been going on for couple of years. The new carb did not help either new head gasket too of course

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Runs fine with two fingers on the air intake or the choke about half on.

Craftsman Garage said:

"Lapped the babes", huh?

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yeah valves did not have any cuts blued them had contact

Craftsman Garage said:

Engine model no. ?

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I’m not their now it is on a red craftsmen 42” cut

Craftsman Garage said:

Engine model no. ?

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Model 33R877 type 0002 code 140757

Now I really lost it. Engines having Babes.

Anyway it sounds like a possible intake manifold problem or a bad spark plug. I had one earlier that a bad plug cause all kinds of running problems above idle.

I would replace the fuel lines with quality hose such as Gates brand, and make sure the tank is spotless especially the exit nipple (debris gets caught in them). Along with that verify the intake gasket seals are good and not reused. This is not a governor problem; it is a fuel/air issue.

Tpieman22 said:

Model 33R877 type 0002 code 140757

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Auto Doc's said:

I would replace the fuel lines with quality hose such as Gates brand, and make sure the tank is spotless especially the exit nipple (debris gets caught in them). Along with that verify the intake gasket seals are good and not reused. This is not a governor problem; it is a fuel/air issue.

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Thanks for the advice. Will update

Sounds like the engine is sucking too much air or starving for fuel. You changed the carb so it's not that. Check fuel filter and gas line and tank (trash in tank or not vented). I would also look for a loose part (maybe the manifold) or a crack (in the manifold).

I have one of those engines on my Craftsman rider, it was hunting real bad, turned out to be the anti-back fire valve, put a plug in it's place, runs good now (all summer)
Thanks,
Doug Lee
*

Tpieman22 said:

Changed carbs adjusted valves still the same thing hunts real bad only runs with choke half on. Changed carb head gasket and lapped the babes still hunts an dies without choke on

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Was it an OEM carb?

Checked the fuel filter?

Hint: (from experience with your issues with those type engines)
Those engines have a plastic intake manifold (that will warp leak air
AND
The o ring manifold gasket at the engine can be replaced with a flat gasket
AND
The Nikki CLONE carb is also a source of problems.
The really good carb is the Walbro LMT and can be found on flea bay every once in awhile.
Also good idea to always check the static governor adjust after replacing or working on a carb.

A bad measley spark plug can make you feel weak upstairs. (after you have spent several hours and dollars replacing other things)

Read post #11 couple times.

Run it with choke 1/2 on and run water over intake mount and carb mount to verify no leaks. If its leaking engine rpm will change. I use oil to check as its thicker and won't get sucked in as easily.

Tpieman22 said:

Changed carbs adjusted valves still the same thing hunts real bad only runs with choke half on. Changed carb head gasket and lapped the babes still hunts an dies without choke on

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Had a couple motors did the same. one the main jet had dirt in it, the other look for air leaks around the carb.

When you say it runs okay or fine with two fingers over the carburetor hole, does it rev up and go to normal full speed of around 3,400 RPMs or do you have to keep the RPMs much lower even with your fingers to get it to run?
If it will go up to its normal operating speed above 32 to 3400 when you're giving it extra choke from your fingers, then you either have a massive air intake leak or the carburetor is not flowing enough fuel.

New doesn't mean good or right..
I never replace carburetors as I would much rather keep the original one and just clean it out.
You will either have a Nikki or a walbro carb and most likely a Nikki.

These things only have one main jet but on the Nick you it can fall out but if that happened it would be laying in the bowl and it'll be running excessively rich.

Generally speaking I can offer you this advice I bought a new carburetor installed it and for 6 weeks I was troubleshooting problems that really didn't exist meaning after 6 weeks I purchased another carburetor I installed it not a problem in the world with the engine. I did purchase a completely different product in other words after 6 weeks I did not buy another one of the same thing I haven't had a problem with it since zero adjustment after install.

Jim

JimP2014 said:

Generally speaking I can offer you this advice I bought a new carburetor installed it and for 6 weeks I was troubleshooting problems that really didn't exist meaning after 6 weeks I purchased another carburetor I installed it not a problem in the world with the engine. I did purchase a completely different product in other words after 6 weeks I did not buy another one of the same thing I haven't had a problem with it since zero adjustment after install.

Jim

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Carbhub 594605 Carburetor for 594605 792768 591734 594603 Single Cylinder Engine Replacement Carburetor - 594605 Carburetor

That's the carburetor I bought that eventually worked perfectly my engine is a 19.5 horsepower single OHV engine now whether that's the spec for yours or not I don't know but in my case it's strange cuz there was no fuel air mixture screw to adjust but there was nothing to adjust it was unbelievable how it ran Right from the get-go. But you could do the Nikki wall bro thing if you choose to.

Jim

Probably a small crack in the plastic fuel line and it sucks air. The crack could be in the fuel tank. I had one that ran good with a full tank and went to hell when the fuel level dropped enough to expose the crack and suck air.

OP checked out on us.

Did you get this running?