Search results

New plugs installed and no more backfiring. Thanks to Bertsmobile1 for all the help.

My neighbor loves me because I do the same and usually run out of grass so I cut his.

Ah! I get it now. I was only considering the hot muffler as the ignition source and not the HOT exhaust from the first ignition. I'll get the new plugs installed and see if I can replicate the issue. As you know better than anyone, troubleshooting an intermittent problem can be difficult...

Thanks for the quick response. Not sure what "afterfire" is. My understanding is that "backfire" is fuel being ignited in a hot muffler. Since the engine is cold, it can't be that. The 2 times I was able to replicate the issue, it backfired immediately upon starting the cranking. I have...

Hi guys, I'm working on a Toro zero turn (Model 75755) with a Toro branded engine # 139-0602. The complaint is that it intermittently backfires on a cold startup. It runs fine once started. I have only been able to replicate the issue twice and both were on a stone-cold engine startup. It...

Update - the pressure washer started fine for a while but recently started kicking back again while trying to start it. My buddy ordered a new ignition coil and set the gap back to 0.010". No change with the new coil. Still kicking back. I think I need to order a book of matches and some...

My buddy picked up the pressure washer today and will keep an eye out for these issues. If they appear, we'll order a new magneto and go back to 0.010 gap. Thanks again for all the help!!

SUCCESS!!! Bertsmobile1 win the prize (if I had a prize to give away). I had the original magneto gap set at 0.010". I set the gap to 0.020" and it jerked out of my hand at 1/2 of a pull. I set the gap at 0.030 and it starts every time and runs great. I wouldn't have ever figured that out...

That's a great idea! I'll try that today after my bloodmobile donation appointment. Thanks!! I wondered that myself but if I disconnect the spark plug, I can pull it over all day without any kickback. As soon as I reconnect the plug, it kicks back when I try to start it. That points me back...

Thanks Bert. Looks like mine is advanced about that much but I still haven't figured out why it's kicking back. I put it all back together today and it started twice with one pull. Woohoo!!! On the 3rd start, it snatched the cord out of my hand again. It's just teasing me now. Dang it!

Thanks to all for weighing in and giving me some things to try. Still stumped though. Looks like I need to tuck my tail between my legs and tell my friend I got my butt kicked with this one. Unless you guys can reach a little deeper into your bag of tricks one more time, I'll admit defeat. :(

I'll put that in my bag of tricks next time I have one stuck. Good idea!

I took a screenshot of a youtube video by Autotech (thanks Autotech) of him removing the flywheel from a GX390. It shows the magnet at about the 12 o'clock position and the piston down about 1" in the bore. With my GX270 magnet at the 12 o'clock position, the piston is at TDC. If I put the...

Yes, the spark plug was out and I verified that the piston was at TDC. It really has me stumped. Do you think a new coil can compensate for the flywheel being off that much? I didn't measure it but it looks about 30 degrees off to me.

I can visually see the compression release mechanism burp the exhaust valve when I have the valve cover off and turn it over by hand. It also doesn't kick back at all if I have the spark plug disconnected. As soon as I restore spark, it kicks back on the first pull.

Is it possible that the crankshaft is a 2 piece component that somehow spun to throw off the timing?

I checked everything again. Attached is a picture of the flywheel and coil (cooling fan removed for clarity). The piston is on TDC, both valves are closed with the proper lash adjustment, the flywheel key is intact (checked a second time). The flywheel magnet looks way too far advanced to me...

I hooked up water to the pressure washer today and disconnected the spark plug wire again. Like before, it pulled over normally several times with no issues (wand trigger held to relieve pump pressure). When I hooked up the spark plug again, on the first pull the cord snatched out of my hand...

Thanks Rivets, I spent the afternoon playing with chalk and monster trucks with my 2 year old granddaughter. I'll teach her small engine repairs soon so she can fix her boyfriends truck someday in high school. I'll try starting it with water attached tomorrow after my doc appt and let you...

Hi guys, I need your help again. I'm working on a friend's pressure washer with a Honda GX270 engine (GCBGT-2225859) and his complaint is kickback when trying to pull start it. He said it just started doing this a few weeks ago. He has had the unit since new and has not replaced any parts on...

StarTech, I wondered if it was a bad needle bearing but I see no evidence that a needle bearing was ever in there. I saw there was supposed to be one in the figure on the JD website but I can't see there was ever one there. Nothing inside the housing to indicate it fell apart and dropped into...

I got the new c-clip today. I went to reassemble the rear end and when I dropped the output shaft back into the transaxle housing, I found the housing was "wallered out" (is that a real word or just my childhood WV lingo coming out?) and the shaft flopped around like a, uh, er, something that...

Make sure your gas cap is venting properly. Loosen the cap and see if it runs past your problematic 5 minute mark.

I'll post the thickness, ID and OD when it arrives. Thanks again for the help.

I knew you guys would help. Happy the answer came so quickly. Thanks Star Tech!!! I'll go order it now.

Hi gang, I have a john deere D100 with a spicer transmission AM134770. The c clip (part number 41 in the attached picture) that holds the pinion gear onto the output shaft broke so I could take the output shaft and pulley out of the top of the transmission. Pretty sure it's not supposed to do...

No, I typed it laying in bed. Did it sound like a good possible cause or a crappy one. Just wondering if I should be insulted or pleased with your accusation? I'm thinking insulted but thanks for reading my reply.

Seat safety switch bad and it thinks that you have been ejected so it grounds the coils?

I turn the mower on it's side and put a very thick piece of angle bar between the base of the crankshaft (i.e. at the lower seal) and my concrete driveway and wail away. This angle bar absorbs the blows so the engine housing and seal don't have to. Have had very good success this way.

Great recommendations guys!! However, I got lucky and am now going to a Plan "B". My father-in-law has a 21HP briggs with a smaller crankshaft diameter that one of my own double pulleys will fit. I'll save the engine with the larger crankshaft along with its original upper pulley and clutch...

Thanks for the options guys! I figured I was going to have to make one since I couldn't find one with that large of a bore. Was hoping I just s**ked at searching and you guys would point me in the right direction. Turns out, I was right. You pointed me in the right direction but one that...

Hi guys! I need some help finding an engine double pulley for my mower. I'm in the process of swapping an engine into my Husqvarna YTA 18542 mower (model 960450055). The donor engine (Briggs 40H777-0241-E1) came out of a Husqvarna GT2254 (Model 96025000201). The donor mower utilized an...

have you checked your valve adjustment? I've had problems where loose valves make for extremely high engine compression that the battery/starter cannot overcome and it draws the battery down hard. If the battery stays at 12+ volts during the starting attempts, I agree with the previous...

I got a new igniter and it restored spark but the mower would still not start. It was backfiring terribly through the carburetor which made us believe it was a sheared flywheel key affecting the timing. Unfortunately, it wasn't. It took a while to figure it out but on a whim, we put...

I tested the components this morning. The pulsers are good and the brand new igniter is bad. I tested about 15 of the 56 paths and not a single reading was in spec. I'll write the eBay seller and see if they'll send me a new one. Otherwise, I'll buy a new one. Thanks for the help!!

Thanks StarTech!!! I'll test them tomorrow. This igniter is new but that doesn't mean anything, does it? Could have failed already I guess. Thanks Jerry

I love a good electrical troubleshooting challenge but this one has got me stumped. I am working on a friend's John Deere with a Kawasaki FD611V-BS01 engine. This mower came to me with a no-start complaint that I identified as due to no spark on either cylinder. My experience with these...