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MVVS .49 silencer problems.

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Old 08-30-2015, 12:40 PM
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RCer
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Default MVVS .49 silencer problems.

Hello

I have 2 MVVS .49 engines with the quite silencer.

My problem is that the silencer is a two part design helt together with rivets. Both silencers are coming apart. The rear half is loose on both of them and oil is leaking out the seam in the middle. Both props are balanced and the engines does not seem to vibrate excessively but still both silencers have become loose in the center.


Anyone who can recommend how to fix this?

Alternatively if thats not possible maybe suggest an alternative silencer which will fit the MVVS .49. MVVS does not sell silencers for this engine anymore it seems. Also I would prefere a different silencer as I am a bit astounded that both have become bad. I live in Denmark so a source for an alternate muffler that can be obtained in Europe would be appreciated.


Thanks in advance for any help

Kind regards
RCer


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Old 01-24-2019, 07:53 AM
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Hi!
Old tread but here goes...
The MVVS silencer can be fixed by drilling three small holes through the sides of the silencer beside the rivets and screw in some small metal screws.
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Old 01-24-2019, 08:48 AM
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Thanks for the reply albeit a bit late. I have since replaced them with the tuned pipe. I was lucky to find some. I still have the silent muffler so I think I will try fix them and go back. They sound better.

how do you make the small screws stick? I can tap the drilled holes for 3mm screws but the silencer wall thickness is quite thin.
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Old 01-26-2019, 08:57 AM
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Hi!
3mm screws are way too big.Use small self tapping metall screws instead.
Those I used on my own silencer had a tread diameter of 2mm.
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Old 01-26-2019, 09:42 AM
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Ok. Thanks.
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Old 01-26-2019, 02:02 PM
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I have one of these mufflers too. Mine broke to where it’s not repairable the way I see it. I’ll see if I can find the pieces and post a picture. The tail section that’s riveted to the front - mine broke before the “band” the rivets go through. The aluminum cracked. The aluminum is very thin and riveting probably isn’t the best way to manufacture mufflers. Probably why they nearly went out of business.
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