Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 5 of 5

  1. #1

    Join Date
    Mar 2003
    Location
    Toughkenamon, PA
    Posts
    81
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    MVVS 26 ccm connecting rod

    I have a and older mvvs 26 ccm the number stamped on the bottom of the crankcase is 1382 it is has the red head, on top of the piston are the following numbers 04.05.04
    The engine has 8 flights on it and less than .75 gallons of fuel through it I thought I was doing everything correctly but yesterday there was a strange noise coming from the engine I landed the plane checked the engine and it was unusually stiff to turn I dissassembled the enginge and found The conecting rod bearing rubbed against the backplate and you can see a small crack and a blueish burn near the crack from overheating I suppose.

    I have not fully leaned out the high speed needle yet. I am using mobile 1 MX2T at 32 : 1 ratio I have the 3226 tuned pipe and am running a 11x 6 xoar prop I did not install the cowl so the motor could get the proper cooling I was simply flying nice easy circles at varying throttle to avoid overheating the new engine
    What would cause the connecting rod to rub against the backplate? and what do I need to do to fix it

    on the horizon site they show a connecting rod and bearings will this fit this engine
    http://www.evolutionengines.com/Prod...D=EVO3094N0951

    Are the evolution parts the same and will they work in this engine.

    any and all help would be greatly appreciatated
    Thank you Mike


  2. #2

    Join Date
    Jan 2002
    Location
    Arcen, , NETHERLANDS
    Posts
    6,571
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: MVVS 26 ccm connecting rod

    The needle bearing has failed, probably by using low octane fuel. You need to replace both connecting rod AND crankshaft.
    11x6 must be a typo?
    The engine is AT LEAST 5 years old. The other engine mounting flange has a letter denoting the year of build. What ignition is fitted?
    These early engines were at the upper design load limit of the big end bearing, so were prone to failure if any engine parameter went out of whack. Service life can be vastly improved by adding two extra shims under the head. Fuel must be premium lead-free of at least 91PON, preferably 93 octane.
    Pe, (www.mvvs.nl), MVVS, MOKImotor, RCexl, MTW, Xoar, Mejzlik.
    Blessing in ignorance? There is sanctuary in analysis.

  3. #3

    Join Date
    Mar 2003
    Location
    Toughkenamon, PA
    Posts
    81
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: MVVS 26 ccm connecting rod

    Thank You for the prompt reply

    yes the prop size is a typo the prop is 18 x 6 xoar
    there is a letter E on the other mounting flange
    the ignition is the vlach EZM1T

    so how can I be sure I order the right parts?

    Thanks Mike

  4. #4

    Join Date
    Jan 2002
    Location
    Arcen, , NETHERLANDS
    Posts
    6,571
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: MVVS 26 ccm connecting rod

    the "E" is for the production year 2003
    You need to mention the crankpin 8mm diameter when you order the crankshaft and connecting rod. (Engines changed to 9mm diameter late 2007)
    Pe, (www.mvvs.nl), MVVS, MOKImotor, RCexl, MTW, Xoar, Mejzlik.
    Blessing in ignorance? There is sanctuary in analysis.

  5. #5

    Join Date
    Mar 2003
    Location
    Toughkenamon, PA
    Posts
    81
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: MVVS 26 ccm connecting rod

    from your website I found this list of parts can you confirm they are correct and do you have them in stock will there be a problem with shipping these to USA

    would the head gasket be the same as a shim
    head gasket 26cc Item # 3094 - 503

    Extra hard alu connecting rod assy
    Item # 3094 - 951

    26cc crankshaft 8mm
    Item # 3094 - 1001

    will this prop drive washer work with an rcexcell ignition #RCO9 on this engine
    26cc prop drive washer for ICU ignitions
    Item # 3094 i 1101

    Thanks again for your help
    Mike


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 11:24 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.