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Very possible, Gebo, especially if the gas wasn’t stabilized or contains ethanol, since ethanol attracts moisture. I always fill my cans with non-ethanol, stabilized fuel. Great point!

It may be a good idea to check for possible fuel in the oil, since it appears the engine was flooded. Gasoline in the oil has a tendency to alter the mixture put forth by the carburetor, causing an extremely rich mixture inside the combustion chamber, especially if the crankcase has taken on...

I, for one, have gained much from the great professionals here on this forum. There’s a ton of very friendly, knowledgeable, and helpful experts that give great advice here. It’s obvious to me that Tim lacks patience, and didn’t want to take the time to do the testing necessary to pinpoint the...

I apologize for lack of clarification in the previous post, so I will do my best to give more details. What I saw was customers who stored their equipment for months on end with untreated ethanol gas. Another common issue was draining gas tanks that had a substantial amount of water in the tank...

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I put StarTron fuel treatment in my gas cans before filling them with ethanol-free gas. StarTron was the only fuel stabilizer we used at the lawn equipment shop I used to work at. Service manager and lead mechanic said it was better than Sta-bil, so I used it in all my equipment during storage...

Sure sounded like a blown head gasket to me. Heard that sound a lot over the years. The part of the gasket from cylinder to the outside edge. Double check compression.

Is this the engine with the accelerator pump attached to the carburetor? Symptoms sound similar to my friend’s mower, with carb spewing gas and excessive vibration. Fuel was pooling up at the front of the carburetor causing it to run too rich and shaking the whole engine. I plugged the small...

Well, I ran the engine some with the air box off to see what I could see. After a couple of minutes, I noticed gas dripping and pooling up in the front of the carburetor. So I pinched off the small hose, and immediately RPM’s went up and the gas dripping and pooling went away. I also pulled the...

OK, thanks! Will do! I too am still learning, and I so appreciate the expertise here on this blog. We’re all in this together, and this is, in my book, a great forum!

Thanks guys. I did indeed notice the two small hoses, and after what you told me, I’m leery I might pinch the one with the metal restrictor inside it, not knowing which is which. I guess I could remove them and check them both over to see which is which. So would you recommend pinching it off...

I’m working on a friend‘s rider that has a CV25-69543 engine that is running rich, but still starts and accelerates fine, but it’s obvious that something’s not quite right. The manual choke operation is absolutely perfect, so it’s not a choke issue. Both spark plugs were black, so replaced both...

I’m checking out my brother’s 5-year-old Cub Cadet xt2 GX54, with a 26 hp Kohler KT745-3085 engine, due to low to mid-throttle surging that has me scratching my head. My first thought was to remove the carburetor, disassemble it and cook it in my heated ultrasonic cleaner, which I did. Once...

I would do a spark check immediately after it quits after it runs a bit. Two things fail when they get hot…..spark plugs and ignition coils. They can still run cold, but when they get hot, they will short out. So check spark when engine quits, but try a different plug(s) first.

I had an experience once where i was getting 14.5 volts out of the voltage regulator, but the battery was discharging during mowing, with only about 10.5 volts, until the battery would no longer run the electric clutch. So I traced the wire coming off the regulator and found the ignition switch...

The current administration has a goal of the total destruction of the USA from within. They will push what is bad, and extinguish what is good. And that includes replacing whatever is gas powered with electric. If it was my shop, concerning electric equipment, I would tell the customer to take...

elmrfudd Forum Newbie JoinedMay 30, 2021Threads0Messages9 Saturday at 9:15 AM / Mower no start I had a similar situation once, and found that I had lost a good ground connection where the solenoid mounts to the frame. I ran a new ground wire from the solenoid to another area of the frame, and...

I’ve worked at a couple of different repair shops over the years, both having pneumatic lift tables, and protocol for walk-behind mowers, tillers, and other smaller 4-cycle equipment was to tip it over on its side (always dipstick side down, of course). Sometimes you needed to prop the engine or...

I had a similar situation once, and found that I had lost a good ground connection where the solenoid mounts to the frame. I ran a new ground wire from the solenoid to another area of the frame, and it cranked over perfectly. So check to make sure your solenoid body itself is well grounded. You...

My dad used to reload center fire cartridges when he was alive, and he tumbled his brass with water, Palmolive dish soap and Lemi-Shine dishwasher additive, using stainless steel pins as his medium, and his brass came out clean and shiny, but always used purified water with no contaminants. I’ve...

Fortunately, I have never encountered those passages with the rubber check valves on a four cycle engine, but I use the torch cleaning wires all the time, and they are great as long as you don’t ream out the hole with a wire with too large a diameter. When I use the ultrasonic cleaner, I use...

If you have slop in your throttle shaft, the surging will likely stop when given a shot of starting fluid at the top of the shaft while running.

Another check for surging is to check for side play in your throttle shaft. Wear in that shaft or guides will cause your engine to suck additional air around the shaft, leaning it out.

I'm guessing a malfunction of the internal decompression lever/spring or improper valve clearances. Improper clearances will give a kickback effect much like hydro lock. Recheck all valve clearances at TDC. Most B&S engines can be set at .005" for intake and exhaust, but check manufacturer specs...

FIXED!!!!! I was about to throw in the towel with this one, as it seemed like converting to manual choke was a hassle and added expense. My thought was, “How do I make this thermistor get hotter, to the point it will function normally?” I had already tested the thermistor with a small flame, and...

I had this same issue with Toro belonging to a friend of mine. It appeared the muffler was not getting hot enough to turn the thermistor arm, even with the thermistor being a new one. My last resort was to drill four small holes in the top of the muffler with a 1/8” drill bit. The holes were...