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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › OS 50 rear bearing particles
11-16-2011 03:26 PM  6 years agoPost 1
CF1

rrApprentice

Olympia, WA

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I was having problems with flameouts so I ripped my 50 apart to check the rear bearing. The bearing after maybe three gallons doesn't seem to have a round bearing left in the race. Looks like someone took a hammer to them. What bothers me is some particles have welded them self to the top of the piston and head. Additionally one of the top edges of the piston is a little beat up. Can I knock the particles off the head and piston and run it or do I need to put a new piston in?

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11-16-2011 04:36 PM  6 years agoPost 2
newlandb

rrApprentice

Decatur, Illinois - United States

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Mine did exactly the same thing. Only difference is the bits of metal not only welded to my head it also welded my ring to the piston. Had to replace piston, ring, and rear bearing. Have no idea what caused it, I was running rich.

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11-16-2011 04:42 PM  6 years agoPost 3
CF1

rrApprentice

Olympia, WA

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My ring is still free so I am hoping I can just clean it all up. I'm sending the motor off to have the lifetime magnum glide bearing installed. Tired of this.

http://www.magnumfuels.com/store/bearings.php

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11-17-2011 07:12 PM  6 years agoPost 4
newlandb

rrApprentice

Decatur, Illinois - United States

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Ummph, never heard of that. I will look in to it. How much do they charge and what type of bearing is this. Thanks.

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11-17-2011 07:43 PM  6 years agoPost 5
CF1

rrApprentice

Olympia, WA

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take a look at this thread:
https://rc.runryder.com/t664707p1/

They charge $50 a motor and turn around is 24 hours.

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11-17-2011 09:29 PM  6 years agoPost 6
newlandb

rrApprentice

Decatur, Illinois - United States

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Ok CF1, I'm sold. As soon as this new installed RC-Bearing (2nd replacement) goes bad I will send the motor to Magnum. Thanks for this info. I do like the OS 50 SX-H and will like it better not having to worry about the rear bearing.

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11-17-2011 09:49 PM  6 years agoPost 7
CF1

rrApprentice

Olympia, WA

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I sent him both my 50's. One has new bearings but I didn't want to have another meltdown and have to replace a piston or something. Being winter and with their turn around time I couldn't resist. Did I mention they have a lift time warranty? Doesn't get better than that.

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11-18-2011 01:56 PM  6 years agoPost 8
newlandb

rrApprentice

Decatur, Illinois - United States

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Sounds good. Do they do anything with the front bearing when sending in for rear bearing replacement. I know they last longer, but just curious.

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11-18-2011 02:06 PM  6 years agoPost 9
CF1

rrApprentice

Olympia, WA

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They said they will replace it if it isn't in good shape. If its ok they leave it alone.

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