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ok sounds good. i'll recheck with 1/4" past TDC and then if same result then i'll give the valve a very very light grind on the stem. thanks.

i was planning to grind down the valve end like 1mm and then recheck if it creates the proper valve clearance. basically i have a clearance tool like in the attached image and took the thinnest one and i could insert it thru where the valve closes against the head (right next to the piston)...

i removed the muffler and opened the valve area and noticed that at top dead center the intake valve has no clearance and due to that the valve is not shut completely. the exhaust valve is fine. i assume this is the issue why there is oil burn and no compression, hence the machine is not...

would it help if i cleaned all the carbon (especially around the valve seats) and installed a new head gasket? or is it better to just get rid of the machine?

i took the head off the engine and here are some photos. i pulled the cord several times and it seems the valves are opening and closing properly along with the piston going back and forth without issues. could it be the magneto is not providing enough spark? but i did hear a very very faint...

ok so i checked everything over again. i used my spark plug tester and i do get spark. but the crazy thing is that if i spray starter fluid into the spark plug hole the machine still does not start or turn over. i did notice the machine has a cheap Chinese made armature. its not the original...

will do. i did spray some into the muffler and heard a huge pop when pulling the cord.

engine model - 120000 Hi All, I don't know much on the history of this engine but I inspected what I could and the flywheel key, magneto, air filter and spark plug are in good condition. I tested with a spark plug tester and I do get a spark. I did clean the carb and fuel tank and put in...

yes actually i was thinking about using thicker oil. what do you recommend to use? 10w-30 synthetic? or something thicker?

makes sense @bertsmobile1. any possible fix for this or maybe time to retire the machine?

update - i ran the tractor for 1 hour without issues on mostly flat ground. but unfortunately the issue re-occured (oil burning), but noticed it occurs near the same area where it occurred before on my lawn. this area is on a slight decline where the engine is pointed downwards. could it be...

@bertsmobile1 - i'll go ahead and change both the O ring and carb gasket. i assume you are referring to the blue and red arrows?

@bertsmobile1 - just to confirm, you are suggesting the air filter housing is letting some dirt get thru which is causing this? just wondering what the best resolution is for this. since i opened up the area i cleaned the head area and will install a new gasket

here are a few more photos if it helps

so i opened up the head and here are some photos. i noticed the gasket is in ok shape. i dont see any break in it between the piston and galley where the push rods come thru. but i do see the piston head has a ton of carbon on it. the cylinder area itself is smooth. i looked at the oil dipstick...

any brand gasket and spark plug you recommend?

here are some photos i took after investigating. i don't see any oil in the air filter (this is an old one from last year so it still dirty). spark plug looks slightly blackened after only apx. 40 mins. of use. i'm thinking at this point its just better to replace the head gasket again. its...

310000

Hi, I changed my head gasket on my 18 HP Craftsman lawn tractor back in 2017 and since then its been running fine. I do proper maintenance every year on it. (spark plug, oil, air filter etc.) But a couple of days ago I started it and it ran fine for 35 mins. But I noticed after I drive the...

i ran it for like 30 seconds

Hi, I recently acquired a leaf blower and don't know much about the history. So I changed the spark plug, carb, fuel lines, fuel filter, and purge bulb. It starts up fine now but I noticed when I run it for a few mins with the throttle engaged and then shut it off, the muffler has smoke...

Hi there, I've started to notice my lawn mower start to surge when I'm using it. I cleaned out the carb a few months back and have a new air filter in it. Any idea as to what might be the cause? Should I put in a new carb? I think maybe there is gunk in the fuel tank which impedes gas flow. I...

Hi All, I have a Craftsman Push Lawn Mower (model # 917.376470) and I've attached a photo of it. It has a key start system as well. It wasn't starting so I decided it was time to do a complete over haul on it. I put in the new following parts: 1. carb 2. breather valve 3. air filter 4. spark...

Hi, I have a Craftsman riding lawn mower tractor (model # 917.273390). So the issue is that when I shift the gears for it to go forward or in reverse it does not move at all. It nudges like an inch and then stops I removed the back plate which basically protects the transmission and pulley...