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Shinden33 Rough Running

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shinden33(at)earthlink.ne
Guest

Posted: Mon Nov 27, 2006 8:02 pm Post subject: Shinden33 Rough Running

Thanks for  the advice guys.  I've tried  everything short of installing the plug kit.  I'm not sure that's the  issue. 

 [quote]      

The    roughness seems to be getting worse & I did discover    using a laser thermometer and the WD40 test that the #5, 7 and 9 cylinders    seem not to be firing. We measured the temps of the exhaust stacks just after    shut down and all were 220+ deg except those three which were 112ish. We also    did the WD40 test (sprayed WD40 on the exhaust just aft of each cylinder).    Again it showed that these 3 cylinders were not operating properly (WD40 did    not vaporize). I have pulled and checked all the plugs, checked the left mag    (another suspected problem), checked all the wires, checked the fine fuel    filter, checked the carb fuel filter, compression checked all the cylinders    (all 69+/80) and have not found the problem. I've consulted with local mechanics who seem to be    out of ideas.  I'm about ready to    call in an M14 mechanic.  Let me know if anyone has any suggestions.   

Scott   

8252

   [quote]     --

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ggg6(at)att.net
Guest

Posted: Mon Nov 27, 2006 8:17 pm Post subject: Shinden33 Rough Running

Have you checked the spark plug leads with a high tension lead tester, it sounds like the leads may be breaking down under a load...  Gary

 [quote]-------------- Original message from "Scott T Glaser (E-mail 2)" <shinden33(at)earthlink.net>: -------------- 



    Thanks for the advice guys.  I've tried everything short of installing the plug kit.  I'm not sure that's the issue. 

 [quote]  

The roughness seems to be getting worse & I did discover using a laser thermometer and the WD40 test that the #5, 7 and 9 cylinders seem not to be firing. We measured the temps of the exhaust stacks just after shut down and all were 220+ deg except those three which were 112ish. We also did the WD40 test (sprayed WD40 on the exhaust just aft of each cylinder). Again it showed that these 3 cylinders were not operating properly (WD40 did not vaporize). I have pulled and checked all the plugs, checked the left mag (another suspected problem), checked all the wires, checked the fine fuel filter, checked the carb fuel filter, compression checked all the cylinders (all 69+/80) and have not found the problem. I've consulted with local mechanics who seem to be out of ideas.  I'm about ready to call in an M14 mechani  c.&nbs p; Let me know if anyone has any suggestions. 

Scott 

8252

 [quote] --

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david(at)mcgirt.net
Guest

Posted: Mon Nov 27, 2006 8:18 pm Post subject: Shinden33 Rough Running

Scott,  

   

  For what it is worth, I had a similar problem with my TW, and went ahead and did the conversion on the spark plugs, in the process , they found to bad leads that we part of the problem..  I was getting a 500 RPM drop on one mag…  it slowly got to that point..   anyway, just my .02  

   

David  

   

         

  

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Scott T Glaser (E-mail 2)

 Sent: Monday, November 27, 2006 11:01 PM

 To: yak-list(at)matronics.com

 Subject: RE: Shinden33 Rough Running  

  

     

Thanks for the advice guys.  I've tried everything short of installing the plug kit.  I'm not sure that's the issue.   

  [quote]    

The roughness seems to be getting worse & I did discover using a laser thermometer and the WD40 test that the #5, 7 and 9 cylinders seem not to be firing. We measured the temps of the exhaust stacks just after shut down and all were 220+ deg except those three which were 112ish. We also did the WD40 test (sprayed WD40 on the exhaust just aft of each cylinder). Again it showed that these 3 cylinders were not operating properly (WD40 did not vaporize). I have pulled and checked all the plugs, checked the left mag (another suspected problem), checked all the wires, checked the fine fuel filter, checked the carb fuel filter, compression checked all the cylinders (all 69+/80) and have not found the problem. I've consulted with local mechanics who seem to be out of ideas.  I'm about ready to call in an M14 mechanic.  Let me know if anyone has any suggestions.  

Scott  

8252  

  [quote]  

--

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JOE HOWSE

Joined: 10 Jan 2006
Posts: 140
Location: DUNCAN BC CANADA

Posted: Tue Nov 28, 2006 6:30 am Post subject: Shinden33 Rough Running

I had similar experiences with both  the Huosai  and M14 P engines,

 Turned out to be breakdown of the mag coils (  the condenser is built into the coil ) so that part can break down

 but the mag still produces a spark, but erratic.

 Cured by changing  the mag coils.

  

 Joe

 

   [quote][b]

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_________________
J.C. HOWSE

shinden33(at)earthlink.ne
Guest

Posted: Wed Nov 29, 2006 11:23 pm Post subject: Shinden33 Rough Running

[quote]    

   Yup    - all cylinders were 69+/80

    

   S

   [quote]     --

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yakplt(at)yahoo.com
Guest

Posted: Thu Nov 30, 2006 10:30 am Post subject: Shinden33 Rough Running

Has anyone suggested checking the valve lash yet?  A cylinder will have good compression, good ignition, etc., etc., but if the valve lash is WAY WAY out of adjustment... and that can happen if it has not been adjusted in years, or... was adjusted by someone not quite up to speed on how to do it... then the engine can indeed run rough.  

   

  Mark Bitterlich

   

  



shinden33(at)earthlink.net wrote:

  [quote]     

  [quote]   

  Yup - all cylinders  were 69+/80

   

  S

  [quote]  --

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