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Engine basics => Engine set up tips => Topic started by: John Castle on March 04, 2010, 09:14:01 AM

Title: Muffler screws for a .25 FP
Post by: John Castle on March 04, 2010, 09:14:01 AM

Does any body know what size the muffler screws are for an os .25 FP. I would like to replace the stock slotted ones with allen head screws. Any ideas on where to get the allen screws would be great.


Thanks,
John

Title: Re: Muffler screws for a .25 FP
Post by: George Waters on March 04, 2010, 12:38:07 PM

John   I just retapped the muffler for 4-40 threads and used regular allen head bolts.  Georg Waters

Title: Re: Muffler screws for a .25 FP
Post by: Peter Hess on March 04, 2010, 01:42:02 PM

John:
I am not sure about muffler screws for the 25 FP but I do know that the muffler screws for the Enya 25 are M3 x 25.  I would not be terribly surprised if they were the same.  Take your muffler with you to your local hardware store and give one a try.  Also, my hobby shop has a good Dubro display of metric parts and I found M3 x 30s there.

Title: Re: Muffler screws for a .25 FP
Post by: ChrisSarnowski on March 04, 2010, 06:01:50 PM

Tower's web site says they are M3x27mm.  I use either 25mm or 30mm length, don't remember which. You should be able to get them at a well stocked hardware store.

-Chris

Title: Re: Muffler screws for a .25 FP
Post by: John Castle on March 04, 2010, 06:27:15 PM

Thanks for the help. I guess it's time for a trip to the hardware store.

John

Title: Re: Muffler screws for a .25 FP
Post by: Paul Smith on March 05, 2010, 11:15:26 AM

While you're at it, replace any other phillips, slotted or Japan standard fasteners with Allen head cap screws.  It won't get any easier when they sieze up.