Time for a Stihl 051AV ressurection!

[ScotO]

Got the bottom end together......tomorrow the carburetor gets the attention, maybe even get the muffler opened up and dual ported. Hopefully this time next weekend it'll be slingin' oil and burning eardrums

 

[thewoodlands]

Looks great Scotty.

Zap

 

[MasterMech]

Scotty, any chance of a short video of that 051 in action?

 

[ScotO]

Mm, you bet. As soon as I get it done I'll do that. Hopefully by this coming weekend.

 

[ScotO]

Rebuilt the carburetor today, also decided to leave the muffler outlet stock for now as I want to get this thing assembled and tested so I'll do the muffler dual porting modification in a week or so. I think the Bosch spark trigger is bad (most likely the reason the original owner pitched the saw out to begin with) so I'm watching for one of them. Hoping to have her going by Saturday or Sunday.

 

[ScotO]

After a PITA getting the ignition parts gathered up for this beast, I finally got it all back together and fired it up tonight. Lots of power!! Still got some fine tuning to do, the saw seems to 'hunt' at full throttle, may put another carburetor on it to see if it makes a difference. The carburetor on the saw now is from the 510 cutoff saw, not sure but it may be a little different than the 051 chainsaw carb. Here's some pics, I'll do a video when I get it tuned right and something to cut with it.


here's a pic with the 36" bar. Gotta get a new full chizz chain for it tomorrow.

a pic of the big 051AV beside one of my 015 limbers with a 14" bar. Looks like a toy beside the big one!

 

[thewoodlands]

SO, the 051av looks great. I stopped by our local stihl dealer yesterday so I could see how that 090 ran, the guy had a big smile on his face but he had some big trees to drop an he only had the 41 inch bar on it which turned out to small. He did get the tree down (big ole maple) but pinched the bar.

zap

 

[ScotO]

SO, the 051av looks great. I stopped by our local stihl dealer yesterday so I could see how that 090 ran, the guy had a big smile on his face but he had some big trees to drop an he only had the 41 inch bar on it which turned out to small. He did get the tree down (big ole maple) but pinched the bar.

zap

I hate it when that happens! I'm going up to the local saw shop to see about a chain for the 36" bar and to see if he has a line on something a little bigger. Hoping to find something between 41" to 60". Just to "have"....

 

[smokinj]

I hate it when that happens! I'm going up to the local saw shop to see about a chain for the 36" bar and to see if he has a line on something a little bigger. Hoping to find something between 41" to 60". Just to "have"....

Grab your billfold and ankles!

 

[ScotO]

Grab your billfold and ankles!

That's about exactly right, SmokinJ!

 

[ScotO]

well I got a chain made up for the beast today at the local saw shop (he only had the Oregon LPX chain, no Stihl Oilomatic, had to settle for second best ), and I figured out the 'hunting' problem I had at full throttle. Just as I suspected, the carburetor I used on my build was out of a cutoff saw, so it was GOVERNED. Which would not allow the RPM's that I needed for the saw. I did a modification to the governor and it tuned up nicely! Also wrapped the full-wrap handlebar with some cushioning tape. I MAY take an hour or two tomorrow morning and make the custom muffler I so desperately want for the saw, that will free up some more power too. I will be heading over to my cousin's OWB woodpile tomorrow (he's got some big ol' logs in that pile) to seat the new rings and break that saw in right. I'll do a video and post it on here tomorrow.

 

[ScotO]

Well as promised here is the break-in video. Not the best quality (I'm no producer/movie star), but as you can see and hear, the saw runs pretty good.

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[ScotO]

Ended up noodling all those logs. Would have filmed it but too hard to keep everything right in front of the camera (not to mention keeping my phone propped up on a log to film it)...

 

[thewoodlands]

Well as promised here is the break-in video. Not the best quality (I'm no producer/movie star), but as you can see and hear, the saw runs pretty good.

Like a surgeon, what bugs are you talking about?

zap

 

[ScotO]

Like a surgeon, what bugs are you talking about?

zap

actually the saw is pretty much spot-on. I do have to turn the idle screw down just a tad, it wants to stutter the chain a little when you sit it down, so that's not a big deal. And I still didn't get the muffler built for it yet. I really need to dress that bar. Just threw it on the other day to get the chain made for it, the rails are in need of dressing. That saw runs like a bear, not high RPM's but lots of torque. Once the muffler is done, it will free it up even more. I had a big smile on my face running that thing today. Can't wait to get the 075AV rebuilt, that will have to wait til fall. I have an 041AV to build for a guy and another 041AV Super to build for myself as a back-up saw, and I will SILENTLY be watching for that elusive 090......

 

[MasterMech]

, and I will SILENTLY be watching for that elusive 090......

Am I the only one who puts on the war paint and camo while surfing eBay?

 

[ScotO]

You're not alone, MM.......LOL......

 

[Thistle]

Me too.

 

[ScotO]

I'm sure we've all seen this one, hmm?

http://item.mobileweb.ebay.com/viewitem?itemId=290663847718&index=0&nav=SEARCH&nid=42157990621

Just a TAD BIT PRICEY But it is a nice rig!!

 

[Thistle]

I'm sure we've all seen this one, hmm?

http://item.mobileweb.ebay.com/viewitem?itemId=290663847718&index=0&nav=SEARCH&nid=42157990621

Just a TAD BIT PRICEY But it is a nice rig!!

Jeez that'll still be on there when I retire in 15 yrs.With their fees for relisting items every 30 days that dont sell,he should just about break even if someone buys it in 2027. Although if you have something listed both Auction & slightly higher at Buy It Now in same ad,they now only charge you once it finally sells.Buy It Now only they still have a renewal fee whether its 5,7,10 days (minimum of 40 cents extra) or 30.Those Final Value fees & now PayPal even taking a cut of the money you're paid for shipping costs are a killer.Thats why anything of size I try to sell on CL first.Most of the time between ebay & paypal you lose between 9 & 12% total depending on monetary value of item.

 

[kettensäge]

I have an 041AV to build for a guy and another 041AV Super to build for myself as a back-up saw, and I will SILENTLY be watching for that elusive 090......

Nice Job Scotty. Ever do any muffler mod's on an 041? I am tempted to do this on mine but have found that most say the returns are minimal because the original design is very good. What is your experience?

 

[ScotO]

Yes, I modded the muffler on one of my 041AV Supers and it seems to breath a little better (not to mention it sounds like a wild animal). The key is to NOT make the muffler port bigger than the exhaust port on the jug. You want it slightly smaller than the jug exhaust port because you need a little backpressure for the saw to run properly. Make the port too big and it'll run like a turd. I'll take pics of my modded 041 muffler this evening if I get a chance.

 

[kettensäge]

Yes, I modded the muffler on one of my 041AV Supers and it seems to breath a little better (not to mention it sounds like a wild animal). The key is to NOT make the muffler port bigger than the exhaust port on the jug. You want it slightly smaller than the jug exhaust port because you need a little backpressure for the saw to run properly. Make the port too big and it'll run like a turd. I'll take pics of my modded 041 muffler this evening if I get a chance.

Thanks for the advice, I will check it out.

 

[ScotO]

I will say one thing, the older saws (no matter what manufacturer) weren't as restricted as the newer saws are, so you don't get quite the performance gain on an old saw as you would on a newer saw when doing a muffler mod. That's not to say that you can't make them breath better, but you do a muffler port job on a newer saw and if done properly it can make quite a difference. One things for sure, it sure makes ANY saw sound better!

 

[kettensäge]

I will say one thing, the older saws (no matter what manufacturer) weren't as restricted as the newer saws are, so you don't get quite the performance gain on an old saw as you would on a newer saw when doing a muffler mod. That's not to say that you can't make them breath better, but you do a muffler port job on a newer saw and if done properly it can make quite a difference. One things for sure, it sure makes ANY saw sound better!

That pretty much mirrors what I found through researching as well. Planning to measure current muffler opening and port opening and compare. If it's 85 or 90% I'll leave it alone.