041 Farm Boss trouble

[Randy Andrews]

I have a late 70’s Farm Boss, that was running great, and suddenly stopped. New spark plug is sparking, carb is pulling gas, air filter is clean, but it will not start. Any help is appreciated.

 

[Maine choppa]

I have to ask an obvious question, when you pull it over slowly does it feel like it has good compression?

 

[Randy Andrews]

I have to ask an obvious question, when you pull it over slowly does it feel like it has good compression?

Yes it does.
It feels completely normal, but it won’t start

 

[Maine choppa]

You say it is getting gas but, have you tried putting a little mix down the sparkplug hole and starting it just to see if it will run for a few seconds?With choke on obviously. I'm wondering if it's not getting enough gas.

 

[Randy Andrews]

You say it is getting gas but, have you tried putting a little mix down the sparkplug hole and starting it just to see if it will run for a few seconds?With choke on obviously. I'm wondering if it's not getting enough gas.

I tried a little starting fluid in the plug hole, still nothing.

 

[Maine choppa]

How fresh is your gas mix? I'm thinking maybe your not getting enough gas or the gas may be bad.

 

[Randy Andrews]

How fresh is your gas mix? I'm thinking maybe your not getting enough gas or the gas may be bad.

It’s fresh stihl mix
I had been cutting for a while. I turned it off. Never came back on.

 

[ATpro]

I tried a little starting fluid in the plug hole, still nothing.

I would check if it was getting good fire from the spark plug.

 

[Maine choppa]

This is baffling, I keep coming back to not enough gas getting through the carb. Possible partially collapsed fuel line. I assume you've opened the fuel tank since this started?

 

[Randy Andrews]

I would check if it was getting good fire from the spark plug.

I checked the spark and it looks good

 

[Randy Andrews]

This is baffling, I keep coming back to not enough gas getting through the carb. Possible partially collapsed fuel line. I assume you've opened the fuel tank since this started?

Yes, and I have clear fuel line, so I can see it flowing in. I cleaned the carb as well.

 

[Randy Andrews]

Yes, and I have clear fuel line, so I can see it flowing in. I cleaned the carb as well.

Also changed the fuel filter

 

[dmb2613]

put a plug in it may be flooded pull the plug and pull the rope 6 or 8 times to clear out the fuel if it is flooded

 

[Patrick1903]

Pull exhaust, look at piston, rings, cylinder. You have spark, you put fuel in cylinder, and no hit? So compression could be an issue. When was last time points were cleaned or adjusted?

If that’s good,Had an issue with my FILs 041 ended up needing new o rings and seal for oiler. Kept getting bar oil into the crank. Saw would run well for 10 mins then die like you turned a switch. New plug would run it for 10 mins, then die again.

 

[Randy Andrews]

put a plug in it may be flooded pull the plug and pull the rope 6 or 8 times to clear out the fuel if it is flooded

Ok
I’ll try that tomorrow

Pull exhaust, look at piston, rings, cylinder. You have spark, you put fuel in cylinder, and no hit? So compression could be an issue. When was last time points were cleaned or adjusted?

If that’s good,Had an issue with my FILs 041 ended up needing new o rings and seal for oiler. Kept getting bar oil into the crank. Saw would run well for 10 mins then die like you turned a switch. New plug would run it for 10 mins, then die again.

I’ve only had it 2 years, but I’ve never adjusted the points.

 

[thompsoncustom]

I checked the spark and it looks good

Broken flywheel key. If the key broke and the flywheel moves enough it will have compression/spark/and fuel but never even try to fire because the sparks at the wrong time.

 

[Randy Andrews]

Broken flywheel key. If the key broke and the flywheel moves enough it will have compression/spark/and fuel but never even try to fire because the sparks at the wrong time.

I appreciate it!
I’m going to look into this. I’ll tear it down tonight if I have the time.

 

[501Maico]

Sometimes fouled plugs will fire in open air but not under compression. Try a known good or new plug.

Starter fluid in the plug hole may have evaporated by the time you tried to start the saw. Squirt a little fuel or starting fluid directly into the carb intake.

Broken flywheel key that was suggested.

 

[Randy Andrews]

Sometimes fouled plugs will fire in open air but not under compression. Try a known good or new plug.

Starter fluid in the plug hole may have evaporated by the time you tried to start the saw. Squirt a little fuel or starting fluid directly into the carb intake.

Broken flywheel key that was suggested.

Plug is brand new. I tried both, in the carb, and in the plug hole. It’s been frustrating. Hahahaha
Carb was also disassembled and cleaned.

 

[Randy Andrews]

Pulled the flywheel, the key is set, still no luck.
Cleaned the carb again.
Still pulling gas
Still good spark
Nothing