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Magnum 4 stroke repair

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Old 04-08-2008, 09:35 PM
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Mode One
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Default Magnum 4 stroke repair

Can anyone put me intouch with someone who can repair or has replacement bearings for a 1.20 Magnum four stroke engine. The bearings may be shot in my 1.20 and it might need repair. Thanks for your help.
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Old 04-08-2008, 09:46 PM
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Default RE: Magnum 4 stroke repair

This place is great:

http://www.bocabearings.com/
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Old 04-08-2008, 09:54 PM
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Default RE: Magnum 4 stroke repair

If I buy replacements, how hard is it to get the old ones out and replace them with the new ones. I've never gotten this deep into tear down of a 4 stroke. I've had them completely apart except for removal of the bearings.
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Old 04-08-2008, 09:56 PM
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Default RE: Magnum 4 stroke repair

IT's not hard at all Mark, use a wooden dowel to tap them in and out with
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Old 04-08-2008, 10:03 PM
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Default RE: Magnum 4 stroke repair

Thanks Mike! Do you lightly heat the crank case first then drive them out, or just tap them out?
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Old 04-08-2008, 10:37 PM
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Default RE: Magnum 4 stroke repair

Just tap them out
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Old 04-09-2008, 08:30 PM
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Default RE: Magnum 4 stroke repair

You must heat the crankcase. They are a press fit. Hobby People are the distributors of Magnum and they will repair it.
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Old 04-10-2008, 01:34 PM
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Default RE: Magnum 4 stroke repair

Put the crankcase in your oven at 200 degrees F and heat for about 15 to 20 mins and the the bearings will tap out very easily. Reheat crankcase when putting the new ones in.
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Old 04-16-2008, 03:56 PM
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Default RE: Magnum 4 stroke repair


ORIGINAL: caddy47

You must heat the crankcase. They are a press fit. Hobby People are the distributors of Magnum and they will repair it.
I thought global hobby was the distributor of Magnum engines, Hobby People is just some retial stores, doesn't warranty work get done at global?

PS Say hi to USNA71 for me.
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Old 04-17-2008, 10:41 PM
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Default RE: Magnum 4 stroke repair

Hobby People is the retail front for Global Hobby.
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