Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

Last year I never did get my Honda HS35 up to snuff. It still only runs when chocked, and when you take it off choke the idle surges and dies, surges and dies and will not run at high speed.

I tried cleaning the carb, But I did not know what I was doing 100% so I may have missed some parts to clean.

I really want to get it going this year so any help, and/or websites would help greatly.

If you have the unit re-assembled and it's doing the things you described...I have two ideas

Are you sure the gas is fresh and not from last year?

When I have an engine that runs like you described, I have had success doing the following. I make sure the fuel is fresh and there is no presence of condensation in the tank. I add carb. cleaner (same stuff used in cars) into  the fuel tank, usually several ounces in a small tank. Start the engine and let it run for a while (at a speed that will keep it running) and listen to the engine. Usually it runs bad at first and then begins to run smoother as the carb. cleaner starts to work. Once it's running better, I adjust the carb. one more time.

Hope this helps;

Jake...

Only do the carb. cleaner procedure if the engine is a 4-stroke. This isn't  for 2-stroke engines.

Jake

Jake: Gas is fresh and I added some Wynns carb cleaner to it, but havn't let it run for very long because I was getting frustrated :D

I am going to take the carb off again this week and inspect for any clogs. I will try your tip and run the engine longer with a boat load of carb cleaner in it this time.

I just went through a similar problem this weekend with a 11hp leaf blower.Took the carb apart and cleand it very well with a briggs carb cleanr and cleaned all the small holes with a fine wire to make sure all was covered.Put it back together and still it would'nt run .(I did not move any of the adjustment screws )I was about to give up when I thought that maybe the problem is in the area of the gas cut off/filter which is original from the mfg.So there I went and found the small sump was full of white sludge which was blocking the filter screen.I Cleaned that very well and put it back together and now it runs very well.I'll just remove the tank when it runs dry and clean it as well because it clogged a second time during the day meaning the tank has some junk floating about.Best of luck,Allan H

I've only done two or three HS35 carbs, but I do remember a bunch of gaskets are used to seal the carb plate, carb & intake. If any of these gaskets are bad, you will also get a lean surge that you describe. If a thorough carb cleaning doesn't correct the surging, get the engine running again & spray starting fluid near the gaskets - if the RPM smooths out while spraying the fluid near a gasket, that particular gasket is bad & needs replacing. Whats happening is that there is an air leak which in turn is causing a lean fuel condition.

Good find Hirschallen - Loudsub may want to check his tank/lines/filter also...

Marty FORMERLY MAJORXLR8N

thanks for the hints/tips guys.

I think I am going to check out the gas feed line. I just want to make sure that it is not obstructed, and gas is flowing fine, I don't think I have checked this portion yet.

As for the gaskets, I had made new ones. I was having a hard time finding some premade ones, so I bought that gasket maker kit and made some myself, because the original ones fell apart as soon as I removed the carb last year. I think it was 2 gaskets. One between the carb and head, and the other between the intake hood and carb.

Ok I took the carb off tonight. seems the gas is just fine. I opened the gas shut off with the hose dangling by itself and the gas dripped out at a consistant pace indicating good fuel delivery so I can check that off.

I did notice one of the gasket sealing the spacer between the carb and head was old and crusty so I will be making a new one from gasket material.

I am attaching some pictures of the carb for reference if it rings a bell for anyone. I am trying to remove that screw in the long middle tube, but it doesn't want to come out all the way? It unscrews to about 1/4" from the opening then just spins and doesn't back out anymore...does it come out?

Heres the screw im talking about.