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Never believed in it myself , I just pour a little marvel mystery oil in my fuel and run it for a while to keep the soft goods from drying out if it's goin to sit idle over a long period of time , Shelf life for gasoline is not great but one season to another has never given me problems

You can verify this with a back light if I'm not mistaken but they do not look like anything to worry with, I would be more concerned with the governor

Doubt there is much difference , I use ear protection with my bad boy , just the nature of the machine

Your battery maybe weak , with no plug it will spin freely as there is no compression , make sure you have a good battery then see how it turn over for starting ,if it kicks off with starting fluid , it's a fuel problem not fire. Also too much starting fluid can make it kick back like your...

When you jump across the large terminals on the Solenoid , you're bypassing the solenoid and throwing direct voltage to the starter, in your case the starter is good , now work backwards from the small terminal from the key switch and check for power, if no power present, it's either a safety...

Shelves ? or Sheeves ? is there a question here ?

If you re install the old blade , does the noise go away ? That would verify if it's the blade change or something else

You say you installed a new carb ? Might still have a carburator problem , even new ones give trouble at times , pull it and check to see if the needle and seat are not leaking , flip it upside down and blow into the fuel supply with the float down , it should not let air pass, if it does , you...

You need to release the tension on your blade belt and then check your spindles for wear, roll them by hand and feel and listen to the bearings , you cannot really tell with the belt in place.

Back fire is a sign of unburnt fuel or timing , usually when timing is off on a small gas engine it will not run at all

You're goin to have to post the model of the machine for these guys to help,

It's either routed wrong or it's the wrong belt

If you're choking it to make it run, it's starving for fuel , you still have a fuel problem with the carb or fuel pump diaphram

I use a pull behind catcher , works well when the grass is dry

Better post a few pictures , I don't know what a " loom " is myself

It will either be 3/8" npt or possibly 1/2 "

Use the square shank extractor , the twist usually will just slip and not grab

Keep drilling it out , get a " heilicoil" or thread insert kit , it will come with the drill , tap and insert you need to replace the bolt assembly,

I don't think what you're seeing has anything to do with it not running right ,Don't get locked into this as the problem , I really doubt this is anything but normal wear / tear in a chainsaw that has seen use. I would look at your fuel system first , your compression is good so cylinder scoring...

What changed when this happened ? Something caused this

Low oil level kill safety switch ?

If it's a safety switch , it will not even turn over , does it turn over and not fire Or does it not even respond to your ignition Key ?

Any pully the same size will do in my opinion , it's not something you need OEM for , just make sure it's the same diameter and same size groove for the belt.

Well at least you found something that maybe the cause

Apples and Oranges when comparing to small gas engines I think

Might look closely at the blades and make sure they're all the same and don't have one possibly bent

Do you have it routed right ? my craftsman never gives any trouble like this , possibly the wrong size wire ?

A bit of grease periodically never hurt anything that is greaseable

If you don't pull the inner seal off the bearings there will not be any grease getting to the bearings regardless of how much grease you pump into the cavity

They make what's called a " Crow Foot " wrench, you can use that to remove the jamb nut that appears to be holding and securing the drain assembly, Look it up and figure out what size you need

Check the tension on your idler pully , this pully needs to " float " while running if it's static you going to have issues with the belt in my opinion , also make sure it's correctly routed, just because you got it that way does not mean it's right

I think his gas was getting into the crankcase , the only way I know of would be from the carb bowl / needle valve not seating and somehow getting into the oil sump

How many hours are on this machine ? did you take a compression test before tearing into it ? Blue smoke would indicate worn rings as well as compression loss Not sure about white smoke , never have noticed this on a small gas engine , Just curious , don't have any solutions myself but...

Just to prove the theory sgkent suggested , clean up the old one and put it back on the machine , if it fires off you'll know the keyway is not cut to the correct orientation . Which is what it appears to be , a machine shop would cost you more than the replacement flywheel and no Guarantee they...

You say you have strong blue spark but no fire ? You have Compression Spark Fuel The last thing is timing , Give it a shot of starting fluid next if you still have No engine response , it's fire or timing

There are only 2 wires that run to the clutch , I would guess they leave the ignition switch and go through a relay then to the clutch , they should be color coded so start at the switch and see where it leads you. You should only have voltage on one of the wires at the clutch when engaged ...

Just worked on one that had a bad battery and would not engage the clutch, new battery solved the problem but good information to file away anyway

That clutch pull a lot of amperage , takes a good battery to engage it

Post a picture if you can

Glad you got it figured out, never seen this before though, guessing you tore it down thinking the dots were aligned if so how on earth did it run before , maybe there's other alignment marks you didn't notice , are they 180 deg apart ? Weird stuff

Check the flywheel key and see if it's sheared

You'll need to post a picture of the carb as it is now so we can see exactly what you're talking about , lots of different set ups for different carbs

low Voltage can Cause this also

Remove the kill wire off the coil and check for spark , if it gives you spark the problem is with the wire if not, it's the coil assembly.

I'd pull and clean the carb and make sure the filter is not dirty, I tried E85 fuel one time and had to keep it choked partially to keep my mower running , also the governor linkage may be sticking and not able to respond when you get into thick grass

There are 2 grommets where the fuel line goes into the tank that need changing as well, if it leaks when you prime it , look at the primer bulb lines to the carb and return back to tank

Check your fuel lines for good flow , when did this start ? all of a sudden or has it been acting up over time ? New components don't mean they're good , I've put new carbs on thinking that eliminated the carb from the issue and was still the carb, same with fuel pumps etc. It does not sound...

I've never seen a carburator smoke , I think you're seeing exhaust , nothing comes out of the carb , only air / fuel intake at that point , if it backfires you may see something there but would not be running good if so , this smoke is coming from somewhere else

Just don't scalp your lawn , it will get thick and healthy as long as you don't cut it too short. I'm in South Louisiana but doubt it's any different up there

Look it up on Amazon , for replacement parts for that machine,