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It depends how badly the cylinder liner is scored. It's cheap/simple enough to replace the head gasket that it would be worth trying. If it works, great! If not, a used engine isn't too expensive either.

It sounds like the engine stops turning as soon as you stop pulling the cord. Obviously you've gone through fuel and spark, but it sounds like it may be a timing issue of some kind. Definitely check that flywheel key too. Let us know what the shops says once you hear back!

Alrighty, finally put together a solution. I put back the original auto choke assembly (the "old style" shown in the doc in post #11). I disconnected the return spring on the choke linkage on the carburetor, then attached a spring to the other side to hold the butterfly closed rather than...

I tried to adjust it again, and once again, it's not working in my favor. I added a vacuum cap to help the arm grab onto the choke linkage, but now it's not opening soon enough. This shouldn't be this freaking complicated... stupid auto choke!

That looks to be slightly different. The auto choke linkage on mine needs to be keeping it in the fully closed position, as the spring on the carburetor keeps the butterfly opened.

Got the linkage, and everything seems to be working properly! But... and you knew there had to be a "but"... just as with the old one, the arm doesn't quite grab the choke linkage on the carb. I'm trying to do a little bending to get it on there better, but it seems the arm is just a couple...

Duh... should have checked that once more. I ended up ordering the linkage assembly earlier just to continue my parts cannon attempts at fixing this damn thing. Hopefully that settles it finally. I don't see why not at this point.

It doesn't seem to be working either way. After a while, I noticed that the linkage had extended, and I was able to tweak the arm to keep the choke open once it was hot. Ran fine. Then today, it didn't seem to extend at all. The spring holds it closed pretty tightly. Is there an updated part? I...

I installed the wax element, and it seemed to work yesterday, and now today it seems to be either heating really slowly, or not at all. I don't know if it's because the linkage on the choke assembly is bent or what. Really annoying at this point... I should just swap it for a manual choke lol.

Thank you so much for posting these! I actually ordered the element shown as part #3 (16620-Z1L-841) in the first PDF attachment. That seems to be the correct thermowax assembly for this style auto choke. Weird, I guess Honda didn't use these for long, since I can find very little info on them...

I believe this carburetor should have a rubber seat, but not the needle. I could be wrong though. I just recently had a Toro with this Kohler XT675 which had similar issues. In my case, the carb kept getting clogged with debris that wasn't sufficiently flushed out of the fuel tank. Always make...

I'll double check the casting on the block, but this should be correct.

I've been trying to sort out the choke on a GCV160 powered Craftsman lawn mower, and I'm getting a bit frustrated. I initially ordered a replacement carburetor with a manual choke lever, which I soon realized was incorrect, as this mower has an auto choke lever. Got the correct carb, installed...

It was a quick cleaning, I just sprayed everything down within the carburetor to get rid of any debris. It was surprisingly clean already. I didn't soak it or anything. It's a Zama H39-79A.

I just rebuilt the carb to eliminate some leaky gaskets, and cleaned everything out really well while I was in there. I'll try adjusting the low speed and see what happens.

I’m trying to get this old Homelite trimmer running smoother (bogs down when I open the throttle more than a little bit) and when I looked at the fuel adjustment screws, the high side looks a little odd. It’s just a solid pin, and there doesn’t seem to be anything behind it that I can adjust...

I just got this Craftsman lawn mower, and when I pressed the primer bulb to try and start it, it just sprayed fuel out of this barb on the side of the carburetor. I looked up parts diagrams, but I can't for the life of me figure out where the other end of this hose is supposed to go. It just...

I'm pretty sure the problem with my non-running Poulan Pro PP335 trimmer is the carburetor. When I press the primer bulb, it doesn't fill with gas or build pressure like it should. I can see a small amount of fuel flowing from the smaller line into the left of the carburetor, and then through to...

I changed the speed cable on my HRR2163TDA and I can't get it to change the selector. When I pull the cable a little bit while moving the selector, it'll move it two positions, but that's it. The selector has been cleaned and lubed as well, so I know the problem lies within the cable...

Pics, as promised. In the second picture, it's the cable going through the grommet on the left, and in the third picture it's the one on top.

I just replaced the self propel clutch cable on my HRR216, and for some reason it still has a lot of slack. As far as I know, it's routed correctly and I hooked in that little plastic retainer. How can I fix this? As of right now, I can't use the self propel function because it's too lose to be...

Finally got my valve clearance issue sorted out on my HRR (I think) so now onto the next problem... The mower starts nice and quick now, but it seems to idle low. If I turn down the throttle from the full position (not choke), it doesn't lower engine speed until it's at the very bottom of its...

I recently got my Honda HRR mower running, and all of a sudden, it stopped working again. The engine turned over just fine before, but now it hits a hard spot when pulling the cord. I already check the clearance on the magneto and the flywheel brake and they're fine. The issue is within the...

My John Deere JS20 has been giving me trouble with this for a long time, and now that I've fixed the self propel and replaced the flywheel and key (it was totally destroyed, flywheel spun on the crank) it is still shaking. It runs perfectly fine, maybe starts and stops a little quicker than...

New to the forum. Been browsing for a little while, but I finally had to join and figure out why my Honda isn't running right. The mower starts pretty easily when the throttle is on full "rabbit." However it doesn't idle if the throttle is any lower, let alone start. I've looked at all the...