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ASP .52 Muffler - What Screws Should I Use?

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Old 09-24-2017, 11:57 PM
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hsanchez
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Default ASP .52 Muffler - What Screws Should I Use?

Good Morning. I recently purchased an OS .55 AX at a swap meet, but it didn't have a muffler, and I understand OS no longer sells a muffler for this engine, at least through Tower. A friend suggested I try an ASP .52 muffler for this engine. I got the muffler, but there are no screws with it. What kind of screws should I use with this muffler? I tried some 3mm screws, but they didn't fit. Any advice here would be appreciated.

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Harry Sanchez
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Old 09-25-2017, 03:23 AM
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O.S. Muffler Mounting Screws #873 (2) | TowerHobbies.com

Tower has the .35 AX muffler listed as a an exceptible replacement.
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Old 09-25-2017, 06:45 AM
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Calvinman
 
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Hi Harry,

I measured the screw on my OS 55 the best I could and got a .5 mm thread pitch and 3 mm bolt diameter. the length of the bolt is 3 and 1/2 cm from shoulder. Hope this helps. the length could be different for a different muffler of course

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Old 09-25-2017, 06:52 AM
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If the 3 mm bolt does not fit, perhaps it has been resized, you may have to go to a local hardware store and try different sizes until on fits, then you will know what size you are after.

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