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Author Topic: Ms 441 problem  (Read 1517 times)

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Offline Justmerh

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Ms 441 problem
« on: March 11, 2017, 06:06:53 AM »
A friend was given a ms441 after his boss put a new jug, piston and head on it and couldn't keep it running right. We got it running but it has a hesitation to it and won't idle.

Offline joe_indi

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Re: Ms 441 problem
« Reply #1 on: March 11, 2017, 07:09:43 AM »
What are the current carb settings? Was the cylinder gasket replaced? Is the impulse hose intact and clear? How is the pickup body in the fuel tank?

Offline Justmerh

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Re: Ms 441 problem
« Reply #2 on: March 11, 2017, 08:40:29 AM »
new gasket and didn't get into it he had it runin when i got there he held it at half throttle and turned the set screws his self all the way both ways and made no dif were is a good start point on the screws

Offline joe_indi

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Re: Ms 441 problem
« Reply #3 on: March 11, 2017, 01:08:51 PM »
....were is a good start point on the screws
If the carb has limiter caps, turn out both the L and H anticlockwise to their stops. If the screws dont have limiter caps turn the screws (H and L) clockwise to their stops and then back them off one turn anti-clockwise.
Turn the LA screw clockwise till the throttle valve is completely closed. Then turn it in 1 - 2 turns so that the valve barely opens.

Offline sawguy21

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Re: Ms 441 problem
« Reply #4 on: March 11, 2017, 06:36:17 PM »
I wonder why the top end was replaced. Maybe it has an air leak, I would be vacuum testing it.
old age and treachery will always overcome youth and enthusiasm

Offline Justmerh

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Re: Ms 441 problem
« Reply #5 on: March 11, 2017, 10:45:00 PM »
He blew the plug out of it. We just replaced the impulse line$11.00 *DanG dollars and $15.00 for the fuel line and $18.00 for the carb kit. That impulse line is bear got it all back together and the lh screw doesn't even touch the throttle linkage. So we just called it night

Offline Canadiana

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Re: Ms 441 problem
« Reply #6 on: March 12, 2017, 01:12:19 AM »
This happens waaay more than is talked about here justmerh
The saw is more fun than the purpose of the wood... the forest is trembling 🌳

Offline Justmerh

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Re: Ms 441 problem
« Reply #7 on: March 12, 2017, 11:10:48 AM »
How can i get the lh screw and linkage to come touch do i just bend the it or can i unscrew it off the shaft and turn it a little then tighten it back up.

Offline joe_indi

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Re: Ms 441 problem
« Reply #8 on: March 12, 2017, 12:17:32 PM »
Could you upload a picture of this

Offline sharkey

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Re: Ms 441 problem
« Reply #9 on: March 12, 2017, 10:00:19 PM »
If this happens to be a computer controlled 441, start it in cold start but dont touch the trigger.  Let it bumble and stumble for a minute or so and then shut it off with the switch.  Remember dont touch the trigger.  This sets the run parameters of the computer, and you should not see the hesitation or stumble once the system corrects.   

Offline Justmerh

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Re: Ms 441 problem
« Reply #10 on: March 13, 2017, 09:22:44 PM »
Think it is the metering lever is set wrong. It started after priming it thru the plug a couple of times pulled the carb no sign of gas under the diaphram sprayed carb cleaner thru the fuel intake with the diaphram back on  opened it up nothing did it again with the needle out and the cleaner came right thru, so thinking it has to be set wrong. just not sure of the setting.


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