028WB refuses to start

[Mark71gtx]

I am working on an 028 Wood Boss that refuses to start. I can get it to hit intermittently at best. I have vac and pressure tested it, and it passed. I looked at the piston and it looks good. I cleaned the muck off of the coil and set it with a business card. I installed my spark tester between the new plug and the coil wire and it is lighting up. I rebuilt the carb (went through the ultrasonic for 30 minutes). It is now flooded to the point it is running down the muffler. Compression tested right at 140. Any ideas?

 

[5000+]

Eliminate the carburetor first. Dump the fuel from the tank. Pull the plug and dry out the cylinder an)d crankcase. Pull the rope several times with saw upright and upside-down. Pull the fuel hose off the carb and make sure the muffler is dry an spark screen is clean. Saw should run several seconds with a small prime of mix. Is the saw a wb with points? (3 leg coil with a wire coming from under the flywheel?)

 

[Mark71gtx]

It is fresh fuel. No points. I had a set of rings here, so I decided to go ahead and throw some in it tomorrow. I have it stripped down now. I am going to see what that does for it. I needed to swap the tank anyway since the AV mount was stripped out.

 

[5000+]

You can get a repair insert for the tank. I would not put rings in yet. Narrow down what's wrong first.

 

[Adirondackstihl]

Hoes the flywheel key look?

 

[Mark71gtx]

I have not pulled it yet. I was trying to get this running in a hurry for a trade. I have decided to be a bit more thorough now. I will make sure it is 100% reliable before I hand it to him. His saw for trade ain't going anywhere...

 

[smokey7]

I had one of these slip the key yesterday. It only sheered half the key. It must have retarded the spark just enough to make it just pop a bit then flood.

 

[sefh3]

Make sure you inlet needle is set properly on the carb. Should be flush with the body.

 

[smokey7]

I suspect these saws or any that gets the key sheered is probably from applying the chain brake while chanel is spinning too fast.

 

[Adirondackstihl]

If the mating surfaces of the flywheel and crank taper are not completely free of petroleum based product, the flywheel will & can slip......sheering the key.

 

[Czed]

Fixed one for a guy it would not start 180 psi after new lines and a carb kit it.was that stupid flocked filter it looked clean it was rotted and wouldn't allow enough air flow flooded severely switched to a screen style starts second or third pull everytime just an idea for you

 

[5000+]

I suspect these saws or any that gets the key sheered is probably from applying the chain brake while chanel is spinning too fast.

Most times the nut is not tight enough.

 

[Basher]

If the mating surfaces of the flywheel and crank taper are completely free of petroleum based product, the flywheel will & can slip......sheering the key.

You missed the ,not, in your reply...

 

[Mark71gtx]

No chain brake on this one. The inlet needle is flush with the body. I tried it with and without the filter. It has the screen filter though. I am going to check the squish tonight and put it back together and see what happens.

 

[Adirondackstihl]

You missed the ,not, in your reply...

Fixed

 

[exSW]

Check the muffler for dirt daubers.

 

[Mark71gtx]

I actually replaced the muffler on this saw. The one that was on it had been brazed, rather poorly. I pulled the muffler from a saw I was going to build for myself. Both mufflers were clean. It took a lot of pulls to get up to around 140 psi. I hope with more compression it will start easier...

 

[Lone Wolf]

Sounds like it could be the carb try another.

 

[Mark71gtx]

Lol, it is the best one I have for this series saw. I will see what else I have lying around when I get it back together. I have a friend who wants to trade me an 038 Super with a 25" bar for the 028. He said he missed his old one and the 038 is too heavy. I will then have an AV, a Super, and a Magnum.

 

[5000+]

No chain brake on this one. The inlet needle is flush with the body. I tried it with and without the filter. It has the screen filter though. I am going to check the squish tonight and put it back together and see what happens.

Sound like a points ignition with no chain brake. The condenser and coil on these can fail and cause various starting and running issues while showing spark on a tester.