I know most Hondas run 10w30. Don’t have any right now. Have some synthetic 5w30 Briggs an Stratton brand. Could I use this? It’s on a dewalt 8 gallon air compressor.

Hello. I’m trying to figure out how to repair my Honda GX390 engine. I can’t pull start at all. It won’t move. So far, I’ve removed the spark plug and it still will not pull. I’ve also added Marvel Mystery Oil and it still will not pull. I can rotate the pistons or cylinders (not smoothly) but it won’t do a full rotation. Eventually reaches a point where I can’t move it at all. I’ve disconnected the belts from the pump as well and it still won’t pull.

Any suggestions on what I should check next or what it can be.

What would be the next logical steps in figuring out what is the problem?

Hope to hear from someone.

I have a 10 year old TroyBilt push’s mower. It has worked great until recently. 2 mows ago, the start up was white smoke but then burned cleaned.

Prior to the last mow, I added a bit of oil, dip stick showed it was just until the fill line. As I mowed, I noticed the power was throttling because the cut was not even, until eventually the motor just stopped. I could not get it to start again, and the mower was on for about an hour prior to the stoppage. Fuel is new and the mower still had fuel.

I have done zero maintenance on the mower, so where do I start? With it being 10 years old, I have half tempted to just buy a new one, but if the fix is $50 and a little time, I rather that than buying a new mower.

trying to determine why it runs on choke only sometimes, and surges, . not sure if an exhaust leak could contribute to this. Here's a video from one side kinda up and under:

https://reddit.com/link/1gggjqo/video/y1iedpbnr7yd1/player

Any suggestions?

Genuine GX25 on a honda badged weed eater about 7 yrs old. Ran fine for about 2 yrs, occasional use. Now it runs fine for about 10mins then bogs on full throttle, so I run at half throttle then a few minutes later wont rev at all and stalls but will start and idle just fine. Runs on 91 but it won't entertain 95.

Things I've done.....(not in order) Replaced fuel lines (also re-routed from behind the clip which kinks them), replaced fuel & air filters and tried running with them removed to test, checked tank cap and tried it with it loose, cleaned carb then replaced carb, replaced carb again with a larger one that has a mixture screw on, cleaned that carb too, replaced NGK plug, replaced coil, checked spark arrestor, checked fan and cleaned everything. Taken to service centre, they say it runs fine, can't find a fault but I guess they just started and revved it a few times and didn't get it hot.

One thing I notice is that if I choke it right down to 1/4ish open, then it revs better, but lumpy as you'd expect, which indicates to me it's a fuel supply issue. I've not done any surgery yet. Any suggestions would be appreciated

Looking for help on a no spark issue my friend brought over his little sisters atv for a no start. First think I did was check for spark and I got nothing. I checked for voltage at coil which is present about 2.3 VAC. I jumped the gun and just went ahead and bought another coil thinking that was the issue and still nothing. Next I thought well maybe the CDI (these are all cheap so I figured why not replace them) same voltage reading no spark. I have voltage for the trigger pulse and from stator. I have ohmed the ground wire from coil, and CDI and engine to the negative on the battery I have ground. I compared the resistance from the old coil to new coil and they’re a lot different. Old one has about .9 kohms from plug wire to primary and new one has .2 from plug wire to primary. Last thing I checked just verify was the 2.3 VAC. I have the same voltage at the plug wire and at the coil which is weird it has resistance but read the same voltage on both sides. It’s throwing me off if anyone had ideas I’d greatly appreciate it.

https://preview.redd.it/w0tg4sdjuzxd1.png?width=713&format=png&auto=webp&s=a71942087343afbe2007cc4ad7cffa3848bc38ef

I have a 5hp Briggs & Stratton (pulse jet carburetor). I have to adjust the idle air mixture screw every time to get it to start and idle. If I turn it off it will not start again without adjusting the idle air mixture screw again. I don't think the screw moves while it is running.

Bonus info: cleaned the carb, new diaphragm, all passages clean (pickup tubes long and short). Pickup bowl is good (used some jb weld to fill rust holes). Has fuel, spark, compression, just mixture required seems to change between runs.

Any thoughts?

I will verify that the screw does not move shortly.

Very engineer illiterate here. I have a Troy Bilt snowblower. Gas is leaking when priming but runs okay with no gas leak. Is this an urgent repair that needs to be done this season or can I hold off? I live in MN and snow is coming soon. Last year it took 60ish days to get my blower back from the local hardware/small engine repair shop.

Concerned about snow coming in the meantime because I travel for work.

Thoughts?

I have a 2 stroke STIHL Leaf Blower. This thing runs great, idles great, good on fuel consumption. The only issue is it takes a hundred pulls to get running. I've tried the choke in every position. Spark plug is clean. What can i do to make this thing start like it should...?

Due to the lack of rain in NJ atm I’ve had to change the air filter on my snapper mower for leaves 4 times already. Good thing I bought a 20 pack of these lil f@ckers cuz most of my power toys use this type of filter but good grief man lol the dust/dirt kick-up is retarded… ok carry on good ppl of Reddit

I have an old Briggs gas tank I'm refurbishing. The old paper or cork gasket is dust.

Any idea what seal it needs or if there's a replacement for the whole thing? My parts catalog unfortunately thinks I'm supposed to have a screw on gas cap tank but it is bayonet prong style

Im trying to get a friend’s kids KFX 50 up and running again. He told me it wouldn’t start a couple years ago so he threw a tarp over it and forgot about it. I drained the fuel, took apart the fuel system to blow out the petcock and lines and replaced the fuel filter. I thoroughly cleaned the carb, blowing out all passages and made sure the jets were not clogged and the needle and seat were working properly. The wires to the CDI were mouse-chewed, so I repaired them, being careful to make sure everything matched. Now the bike runs sometimes. It will start hard or not at all and then have an off throttle bog. Then it won’t start again, then it will start with starting fluid, then it will start easily, idle perfectly, and die but have lost the bog. Not necessarily in this order. Sometimes it acts like it has lost spark, sometimes it acts like it is fuel starved. Any advice is appreciated!!

I have a Kohler command 25 hp and ive found little to no torque converters pls send a link if there are an adapter