Author Topic: Starving for gas  (Read 278 times)

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Offline Bambamshere

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Starving for gas
« on: April 30, 2018, 06:04:37 pm »
Ok so I am new here. I have a Mccullock Mac 110. I have been trying to start this chainsaw.

Ok here is the story. This chainsaw was bought I think back in the 1970s by my father. He said that it had shut down and he couldn't get it back going. That was in the 1970s. So it was put on a shelf and kind of moved from place to place and was a project that was supposed to get to. Well he passed and never got to it.

Now fast forward to today. I have rebuilt the carburetor and cleaned it out. I got the chainsaw going but it starts for about 10 seconds and then it dies. I think it is starving for gas. When I had the thing apart I noticed that there is a sponge type piece in the gas and oil tank. It is where the gas piece from the carburetor fits in to the gas tank. This sponge is hard and not sure if it is supposed to be soft. I blew through the top of the tank to get all the old gas out but didn't take the sponge out. Wasn't sure if it came out. Can some tell me if it even is supposed to be there and if it is soft or hard?

Why may it not run.

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Offline Al Smith

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Re: Starving for gas
« Reply #1 on: April 30, 2018, 08:34:00 pm »
It's probably what's left of the old gas filter .I think on the Mini's which is what a 110 is,I think they had a metal type filter with a piece of felt like stuff around it   .Which could have hardened up .You could have sucked some crud off the bottom of the tank and plugged the carb .The kits BTW for that certain model of Zama,if that's what it is are very hard to find .
Another thing.Because of the age,which it's not a new spring chicken the fuel line could have a crack in it up above the level of the gas in the tank .You might get enough sucked into the carb to start it but it dies after a few seconds .
Minis which BTW are the most frustrating saw to work on ever made are famous for one thing .They either run great or they don't run at all .Fact I was given one,non runner that had the original McCulloch chain on it that had never been filed.
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Offline Cut4fun .

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Re: Starving for gas
« Reply #2 on: May 01, 2018, 08:02:53 am »
mcculloch 110 120 ipl   http://www.barrettsmallengine.com/partslist/mccullochmac110mac120.pdf

My dad bought one of these new back in 70's and still has it.  It vapor locks once it gets hot from running. Lets just say it isnt my fav to use. I gave him my ole poulan 2000 I bought new in 94 later on to replace it.

I remember that felt weird looking filter in the tank. Maybe IPL above will help. IMO run new line and change filter.  Also make sure when rbuilt carb you got the order right putting gaskets and diaphragms back in.
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Offline Bambamshere

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Re: Starving for gas
« Reply #3 on: May 01, 2018, 01:13:46 pm »
Thanks for getting back to me. If I getting what you are saying the fuel filter is in the tank on one of these. I put the chainsaw together 2 days ago till I heard back. Was going to take apart again and look at tank. Should the gas be free flowing through the filter when you tip the tank over because it isn't. Whould have a clue where you could even by a new filter for the tank. I have now looked at 2 parts books for this chain saw and neither has it. Any ideas what else I could use.

Offline Al Smith

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Re: Starving for gas
« Reply #4 on: May 03, 2018, 04:27:58 pm »
Give me a day or so to check what's up .I have a few minis in the shed .One with a tuned pipe as a matter of fact .Maybe the  only one in the world .

Offline Bambamshere

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Re: Starving for gas
« Reply #5 on: May 03, 2018, 06:43:42 pm »
So this might make you laugh. Ok so I need the fuel filter/pickup for my mini and I decided to go to my small engine place because the can get a lot of stuff for old stuff. Thats seems like all I have. Anyways he tikd me to pitch the piece of crap in the garbage and buy new chainsaw. I asked so you can't find the part and he says nope no longer made. Ebay has a few of them.

Offline Bambamshere

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Re: Starving for gas
« Reply #6 on: May 03, 2018, 06:46:01 pm »
Oh yeah I took fuel filter out of tank and it was pretty hard. Is it supposed to be hard or should just soak it in gas. I mean it say there for 30 years.

Offline Cut4fun .

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Re: Starving for gas
« Reply #7 on: May 03, 2018, 07:21:40 pm »
Sorry I have no clue on that. The one in dads was like felt.
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Offline Eccentric

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Re: Starving for gas
« Reply #8 on: May 03, 2018, 09:54:12 pm »
 ??? What's a Mccullock???
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Cut4fun .

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Re: Starving for gas
« Reply #9 on: May 04, 2018, 07:33:31 am »
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