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Engine Mounts

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BobbyPaulk(at)comcast.net
Guest

Posted: Fri Jun 27, 2014 3:21 pm Post subject: Engine Mounts

Guys 



My engine mounts are loose and the bolts are bottomed out.



I noticed there was about 3/32" gap from the back of the engine mount to the front of the back rubber doughnut on both sides of the top engine mount.

I am getting word that the original rubber mounts are needing replacement some as early as 100 hrs or so. I have tightened mine up once but now the bolts are bottomed out. I am pondering whether to replace with the original or go with the higher Durometer Sonex.



You may want to check yours on your next "Conditional".



Has anyone on this list had to change out their engine mounts? Why?



Any info would be appreciated.



Bobby  ( age 76 )

Zodiac 601 XL "B"

Jabiru  3300  S/N  1141

Sensenich 64" x 51" Prop

Bing Carb 260 Main & 290 Needle Jet

Status - Flying  217 hrs. 





 [quote][b]

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rmuff(at)att.net
Guest

Posted: Fri Jun 27, 2014 5:27 pm Post subject: Engine Mounts

Bobby.

      Just received a set of engine mounts from Sonex (about $65 with 

shipping).  I was willing to spend this much extra to try to avoid 

changing them within a short amount of time.  Purchased a partially 

completed kit with the Jab 3300, ser # 3a 1437, so it hasn't flown yet.  

Thank you for mentioning about the looseness you experienced.  I will 

change the mounts and probably hang the engine next week.  Each of the 

rubbers is identical, there is no thicker / thinner, top / bottom 

difference.  Haven't  yet compared the hardness but the new ones seem to 

be harder.

      Sorry I don't have the information you need but I wanted to thank 

you for reinforcing my decision to spend the extra $$$

Richard.

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matronics(at)rtist.nl
Guest

Posted: Fri Jun 27, 2014 11:15 pm Post subject: Engine Mounts

The bolts bottoming out is normal. They are supposed to. The rubber     is clamped between the engine mount and the big aluminum washer. The     washer slides inside the mount until it hits a ridge. This should be     a solid connection, the washer isn't supposed to slide in and out.     Check the detailed drawings in the installation manual.

     

     On 6/28/2014 1:21 AM,       BobbyPaulk(at)comcast.net (BobbyPaulk(at)comcast.net) wrote:

     

     [quote]                Guys 

         

         My engine mounts are loose and the bolts are bottomed out.

         

         I noticed there was about 3/32" gap from the back of the           engine mount to the front of the back rubber doughnut on both           sides of the top engine mount.

         I am getting word that the original rubber mounts are           needing replacement some as early as 100 hrs or so. I have           tightened mine up once but now the bolts are bottomed out. I           am pondering whether to replace with the original or go with           the higher Durometer Sonex.

         

         You may want to check yours on your next "Conditional".

         

         Has anyone on this list had to change out their engine           mounts? Why?

         

         Any info would be appreciated.

         

         

         

         

         

         Bobby  ( age 76 )

           Zodiac 601 XL "B"

           Jabiru  3300  S/N  1141

           Sensenich 64" x 51" Prop

           Bing Carb 260 Main & 290 Needle Jet

           Status - Flying  217 hrs. 

           

           

         

       

        	  Quote: 	
		  

	
     [b]

- The Matronics JabiruEngine-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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UK Clive

Joined: 17 May 2013
Posts: 27

Posted: Fri Jun 27, 2014 11:58 pm Post subject: Engine Mounts

Do you have the packing washer fitted? Large aluminium one? Makes a tighter clamp on the rubber.



On 28 Jun 2014, at 08:00, Rob Turk <matronics(at)rtist.nl (matronics(at)rtist.nl)> wrote:

[quote]                   The bolts bottoming out is normal. They are supposed to. The rubber     is clamped between the engine mount and the big aluminum washer. The     washer slides inside the mount until it hits a ridge. This should be     a solid connection, the washer isn't supposed to slide in and out.     Check the detailed drawings in the installation manual.

     

     On 6/28/2014 1:21 AM,       BobbyPaulk(at)comcast.net (BobbyPaulk(at)comcast.net) wrote:

     

      	  Quote: 	
		                  Guys 

         

         My engine mounts are loose and the bolts are bottomed out.

         

         I noticed there was about 3/32" gap from the back of the           engine mount to the front of the back rubber doughnut on both           sides of the top engine mount.

         I am getting word that the original rubber mounts are           needing replacement some as early as 100 hrs or so. I have           tightened mine up once but now the bolts are bottomed out. I           am pondering whether to replace with the original or go with           the higher Durometer Sonex.

         

         You may want to check yours on your next "Conditional".

         

         Has anyone on this list had to change out their engine           mounts? Why?

         

         Any info would be appreciated.

         

         

         

         

         

         Bobby  ( age 76 )

           Zodiac 601 XL "B"

           Jabiru  3300  S/N  1141

           Sensenich 64" x 51" Prop

           Bing Carb 260 Main & 290 Needle Jet

           Status - Flying  217 hrs. 

           

           

         

       

        	  Quote: 	
		  

	
     

	
   

[b]

- The Matronics JabiruEngine-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?JabiruEngine-List

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