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Author Topic: Stihl 290/390  (Read 914 times)

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Offline 67L36Driver

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Re: Stihl 290/390
« Reply #40 on: January 15, 2015, 01:12:27 pm »
I just purchased a 49mm complete engine from Hutzl.  Purpose is to make a MS290 worth it's keep.

Any 'gotchas' or pitfalls to my plan?
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Offline 660magnum

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Re: Stihl 290/390
« Reply #41 on: January 15, 2015, 01:14:36 pm »
Make sure the piston skirt clears the counterweight
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Offline 660magnum

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Re: Stihl 290/390
« Reply #42 on: January 15, 2015, 01:18:40 pm »
Bolt holes are not always the right size or threads in the past.
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Offline 67L36Driver

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Re: Stihl 290/390
« Reply #43 on: January 22, 2015, 01:45:28 pm »
China air filter covers are a poor fit.
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Offline Fish

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Re: Stihl 290/390
« Reply #44 on: February 11, 2015, 09:33:17 am »
Looks like those are 029 air filter covers, on Ms290s
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Offline 67L36Driver

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Re: Stihl 290/390
« Reply #45 on: February 11, 2015, 11:03:23 am »

Quote from: Fish on February 11, 2015, 09:33:17 am
Looks like those are 029 air filter covers, on Ms290s

I've since discovered the two styles of cover.  Lever and round knob. 

Possibly early and late production??   Flat with round knob and humped with lever.
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Offline Fish

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Re: Stihl 290/390
« Reply #46 on: February 12, 2015, 10:26:24 am »
only 2 styles are humped and flat on the Stihls, I won't speculate on the Chinese junk.
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Offline jmester

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Re: Stihl 290/390
« Reply #47 on: March 22, 2015, 08:12:45 pm »
Working on a 390 the cast in key is sheared. What do you guys think line it back up and seat the taper well and torque it down a little tighter then the torque spec in the sm or hunt down a used one to put on there?
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Offline Cut4fun .

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Re: Stihl 290/390
« Reply #48 on: March 22, 2015, 09:04:31 pm »
Me with cast in keys that are gone broken  or ground off. I just line up tighten. I never torqued them with a torque wrench before.

Making sure both mating surfaces are clean clean clean.
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Offline jmester

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Re: Stihl 290/390
« Reply #49 on: March 22, 2015, 09:07:42 pm »
That was what is was thinking as well. Thanks for the reassurance.
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