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Overkill338

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I got every part I need to build the 390 engine. Then I can just swap it on to the 290 chassis. This is one way to completely test Hyways products.

Would you guys put a little Motoseal around the oil seals?
 

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Same here. Last 310 I did I sealed the clamshell only. No problems at all! My Dad bought an 029 many years ago from his cousin who has a Stihl dealership. It was used and had been "repaired". That thing absolutely screams! I feel quite certain it has a 390 engine in it! Some day I'm gonna convince Dad to let me pull the spark plug and muffler so I can measure the bore and stroke!
 
I picked up a 290 from a dealer the other day for a song. The tag says "bogs in cut" and "needs dirko seal". The muffler and studs were missing so I have them coming. I'm skeptical of the assessment. The piston and cylinder look pristine and the H screw was four full turns from seated. Once I have everything to complete it I'll test for leaks and make it run. I've never been a fan but the "farm boss" is an easy sale.
 
I picked up a 290 from a dealer the other day for a song. The tag says "bogs in cut" and "needs dirko seal". The muffler and studs were missing so I have them coming. I'm skeptical of the assessment. The piston and cylinder look pristine and the H screw was four full turns from seated. Once I have everything to complete it I'll test for leaks and make it run. I've never been a fan but the "farm boss" is an easy sale.
I’ve done the upgrade, they’re a brick, but homeowners love em. The one I did for a friend went well, he’s still using it. :cool:
 
Doesn’t the manual call for Dirko around the seals?

I did it on every 1127 I’ve rebuilt. I’m sure there’s enough squeeze out to keep ya safe, but if the manual calls for it, I usually do it.

There are two different style seals as well. You probably have the style designed to be installed when the pan is split... which, again, I would use light sealer on.
 
Doesn’t the manual call for Dirko around the seals?

I did it on every 1127 I’ve rebuilt. I’m sure there’s enough squeeze out to keep ya safe, but if the manual calls for it, I usually do it.

There are two different style seals as well. You probably have the style designed to be installed when the pan is split... which, again, I would use light sealer on.

I've already boxed it all up to ship, but I believe you're right. I'll tell him about sealer around them.
 
That is kindof cool topend. It looks like a hybrid closed openport jug. Ive seen them for the husky 55s but not for the 390s. Curious how it runs. See if you can get any feedback from him.
 

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