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TYCINC · #21 08-16-2009, 01:54 PM

Quote:

Originally Posted by dishboy

It is easier and faster to just carry a extra plug, and lay it on the cylinder , hook the coil lead to that.

It could very well be fuel, especially ethanol, you don't think already hot fuel next to a hot engine is not going to get hotter?

Same difference with the plug.. No i dont think its the fuel. his other equip is running fine on the same gas. . . and if the trimmers are all about the same age, given my exp with stihl over the years its the coil.

dishboy · #22 08-16-2009, 02:14 PM

Quote:

Originally Posted by TYCINC

Same difference with the plug.. No i dont think its the fuel. his other equip is running fine on the same gas. . . and if the trimmers are all about the same age, given my exp with stihl over the years its the coil.

It could be the coils, it could be ethanol in the heat, it could be the heat and lean A/F ratios of smog carbs, it could be coking, it could be gas caps not venting in the heat, it could be crap in the internal fuel circuits, or it could be a combination of any of these things. Making a blanket statement could be wrong and if a frog had wings he wouldn't bust his ass landing on rocks!

PCSLAWN · #23 08-16-2009, 05:24 PM

just remove the screens. easy fix

Smithco Lawncare · #24 08-16-2009, 05:27 PM

Quote:

Originally Posted by PCSLAWN

just remove the screens. easy fix

I removed the screens a long long time ago
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ed2hess · #25 08-16-2009, 06:44 PM

Take those units and tie them down to a bench and run them wide open to verify that it isn't the coil. Also run them in different positions. However it does sound like a starvation of fuel problem. I would replace the caps and all the fuel lines....then I would go into the carb.

Turf Dawg · #26 08-16-2009, 09:27 PM

I never thought to ask, but what model Stihls are we talking about?

Smithco Lawncare · #27 08-17-2009, 12:52 AM

Quote:

Originally Posted by Turf Dawg

I never thought to ask, but what model Stihls are we talking about?

2 fs85's and a fs90. all around 4-5 years old.

huttoncut1 · #28 08-18-2009, 01:09 PM

just curious, do you run your trimmers with the guard removed?

Smithco Lawncare · #29 08-18-2009, 02:53 PM

Quote:

Originally Posted by huttoncut1

just curious, do you run your trimmers with the guard removed?

Yeah, no guard. I went to the dealer today and he said it's likely that I need to loosen the gas caps. Somebody on this thread already said that
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