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  #1  
Old 12-21-2002, 09:53 PM
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jeffyr jeffyr is offline
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Backpack motor seized

This is a quote from another thread :
"Been running Amsoil remix at variable ratios for 8 years. 60:1, 70:1, 80:1 100:1.... whatever. Works great. Had one Stihl backpack engine seize, not because of the mix, because it was run with straight gas for over 20 minutes (well 4-5 minutes, 4 or 5 times total). Tore it down, unstuck the ring, threw in a little assembly lube and back to work it went. I believe the residual Amsoil allowed this."


Anyone think this is possible ? I have a Red Max 6200 that was run for a tank or so on Amsoil at 200:1 by accident and seized. The backpack has been running Amsoil this whole year (after switching from regular 2 stroke@32:1) and although it is 4 seasons old and does have quite a bit of use on it, it still ran strong. I guess it is worth a shot since it is worth nothing to me but a parts machine.

Thanks.

Jeffyr
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  #2  
Old 12-21-2002, 11:13 PM
General Grounds General Grounds is offline
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:blob3: jeff, if the rest of the blower is in good shape you can get a short block for that blower its about $200 and takes about a 1/2 ande hour to do. the redmax part # for the short block is 2750-05010, probably a good idea to change all gaskets too, gasket part # is 2750-06010, if you do this you will virtually have a brand new blower. i've done it once and worked out very well. Tony
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  #3  
Old 12-22-2002, 06:07 AM
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jeffyr jeffyr is offline
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$200 sounds allot better than $500 Tony.
1/2 hour ! Does it come with instructions ?

Thanks very much.


jeffyr
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  #4  
Old 12-22-2002, 10:10 AM
General Grounds General Grounds is offline
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:blob3: jeff, there are no instructions but it is very self explantory.tony


nedd any help just send me an email
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  #5  
Old 12-22-2002, 01:58 PM
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captdevo captdevo is offline
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better check your prices again....it'll cost ya close to $300!!

i take trades on equipment too!!
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  #6  
Old 12-22-2002, 04:27 PM
Doc Pete Doc Pete is offline
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I'm not sure of the exact question, but first, Gas is "not" refined well enough, and because of this there is a "small" amount of oil in it. Second, "hard siezes" are usual from a new unrun motor, which are the ones that can ruin a motor. Yours of course had been run a lot and clearances have opened up a bit and I believe this could have saved your motor.
Pete
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  #7  
Old 12-22-2002, 04:32 PM
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captdevo captdevo is offline
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if you ran 1 or more tanks through it, i'd take it apart and see.

i'd bet you scored the cylinder wall, and overheated the bearings as well.
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  #8  
Old 12-22-2002, 04:36 PM
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jeffyr jeffyr is offline
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Pete,

The original question was "Anyone think this is possible ? " in reference to another post about freeing a stuck piston and using the blower again. I never mentioned anything about the gas refining ......but when you say "Yours of course had been run a lot and clearances have opened up a bit and I believe this could have saved your motor." are you saying it is worth a shot to open it up and try and free it before looking at alternatives ?

If so....what is the best way to free the piston from the head ?



Thanks.

jeffyr
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  #9  
Old 12-22-2002, 05:19 PM
MOOSE MOOSE is offline
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I've seized many of back pack blowers & lawn boy push mowers. Put some oil down spark plug hole and let it sit over night. Make sure u put 2 cycle oil though. And crank on it and it should break loose. I've done this mant times.. Did it once on an 350 motor too! it worked.
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  #10  
Old 12-22-2002, 05:21 PM
Doc Pete Doc Pete is offline
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Quote:
Originally posted by jeffyr
Pete,

The original question was "Anyone think this is possible ? " in reference to another post about freeing a stuck piston and using the blower again. I never mentioned anything about the gas refining ......but when you say "Yours of course had been run a lot and clearances have opened up a bit and I believe this could have saved your motor." are you saying it is worth a shot to open it up and try and free it before looking at alternatives ?

If so....what is the best way to free the piston from the head ?



Thanks.

jeffyr
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