abused poulan question (answered...with tannerite)

[Nutball]

I have an abused Poulan



very low compression, but it hardly has any use



Shall I abuse it some more???

 

[bagpipingtrucker]

[emoji879][emoji879][emoji879][emoji879][emoji879][emoji879][emoji879][emoji879]

Homelite collector in training [emoji879]

 

[ktmtigger]

Pull the jug clean up the Piston , reassemble and run

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[Nutball]

The cylinder does not look good on the exhaust side, it's scored pretty bad, and the ring noticeably sticks out a lot as it moves past the exhaust port. It did try to fire when I put some of that thick oil on the piston.

I got this from someone someone else knew. They said it was used once or twice, but wouldn't start anymore, and a repair shop put a new carb on it, but it still wouldn't start. I assumed low compression. I took the plug out and it was covered in a metallic grease, so I assumed bad scoring, and sure enough it was.

 

[oldbitz]

Sold as a McCulloch here in Aus. Looks like the usual homeowner type abuse, start it and rev its tits off while cold and throw a bit of stale E10 into the equation you have the perfect throw away.

 

[Manofstihl661]

Yessss yessssss let the hate flow through it

 

[cuinrearview]

Probably not a good long bar saw.

 

[e.fisher26]

Could use it to tap in wedges


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[Nutball]

I'll try a quick timing advance, muffler mod, and see if I can rig up a way to dump nitro into the carb, if it will even fire up. I got a 20" Echo bar to fit without a clutch cover, so I'll have the chaps and even welding gloves on in case the chain comes off.

 

[Nutball]

Well, in my rush to get it all done before it got dark, I didn't think to check the muffler for a restrictive baffle when I modified it. I didn't even take the muffler off for the mods. I richened the needle 5 turns, and rigged up exhaust to pressurize the gas tank to push unregulated nitro into the carb. No tuning, I'm just going for it, and hoping the nitro does it's job.

Anyway, here's the video. The gas line was still full of normal gas when it first started. I mixed up some roughly 45% nitro to run it on since I have limited 66% and it is expensive. I also used some gear lube to help the starting compression. The chain's a bit aggressive for 42cc's

I might take another shot at killing it. I think it cooked from no top cover to direct the airflow, not to mention the nitro. The fuel was boiling in the crank case after the first run.

 

[Wood Doctor]

This reminds me of my first chain saw that I bought in 1975 -- a Poulan XXV CounterVibe made in Shreveport, LA. I ran it for a year and then loaned it to a "friend" who straight gassed it. The dealer said, "Forget it. Buy another saw and don't loan it out to anyone." Back then, parts were expensive.

 

[Nutball]

I'll try tannerite next

 

[Nutball]

 

[Nutball]

 

[Wood Doctor]

I tried to rebuild one five years ago that had been straight gassed. All was going well until I was tightening the cylinder bolts back down to secure the new top end. I heard a loud crack! The entire new cylinder split down the side like an egg shell.

So much for that operation. I said to myself, "Never again."

 

[I saw a lot]

View attachment 223101



View attachment 223102

@Wood Doctor can fix it.

 

[Wood Doctor]

@Wood Doctor can fix it.

Not that one in the Pic. Gasp!

I must admit that I have brought back to life a few Wild Things, but when it comes to rebuilding the top ends, I walk away from them. The first thing I check for is their compression. If less than 100 psi., it's hardly worth fooling with them. I've already been stung by that bee.

 

[Brush Ape]

I may have chuckled a little.

 

[furb]

Spark plug still looks good.

 

[Nutball]

A friend of mine kept it to try running in something. The explosion did loosen it in the cylinder threads.