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Old 01-26-2010, 04:07 PM   #1 (permalink)
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1983 indy 600

Hey there I got a few questions about this 600 I picked up the other day. first off what is the fuel ratio to mix it at? what size carbs are supposed to be on it? I got this thing home found one of the crank case plugs in the bottom of the sled. so I ripped the fuel system off and had to rebuild the fuel pump. rebuilt the carbs adjusted them and everything. so put it all together started right up ran perfect. we took it out to a field to run it, and had a few good runs on it so then just tooling around a little bit and the motor locked up. what could have gone wrong?? my first assumption is that the oil mixture was wrong?
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Old 01-26-2010, 05:41 PM   #2 (permalink)
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It should be oil injected.
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Old 01-26-2010, 05:42 PM   #3 (permalink)
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I would guess 38 or 40 carbs. Mikunis. But im not 100% sure.
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Old 01-26-2010, 05:45 PM   #4 (permalink)
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sounds like the motor siezed. i agree i think that motor should be oil injected. look for an oil reservior and make sure there was oil in it. probly gonna be a lost cause if it ran tight.
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Old 01-26-2010, 05:47 PM   #5 (permalink)
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IT has a hole down on the bottom of the block where the pump looks like it would go like on my 94 600 but it doesnt look like there are spots for bolts and I put my finger in it and it feels like it is just a dead end I cant feel anything in the hole. there was no resevor either but I think it has been around a while so who knows what someone did. I dont see any evedence of oil injection anywhere but it could of all been taken off I guess. why would someone do that??
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Old 01-26-2010, 09:27 PM   #6 (permalink)
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I guess some people make an oil injected sled pre mix just to have assurance that the oil pump wont doesnt go out and their motor dont blow up.
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Old 01-27-2010, 12:09 AM   #7 (permalink)
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I have done some more research and this motor is not oil injected. so that being known it should have been good unless i mixed the gas wrong right? does anyone know what the ratio should be.
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Old 01-27-2010, 07:06 AM   #8 (permalink)
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all the outboard fixin` old timer tell me to run 50:1 in any 2 stroke. i go 40:1 and 25:1 on an old Yamaha scooter i use to get to class and back(cant beat 100 mpg lol)
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Old 01-27-2010, 09:38 AM   #9 (permalink)
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I would run it more rich than lean. 50:1 doesnt have that much oil and i would run more of a 40:1 mixture. Thats my opinion though, if i had a premix sled, id rather have it run a little more rich than lean.
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Old 01-27-2010, 10:17 AM   #10 (permalink)
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id go about 35:1 till you start fouling plugs then start running leaner like 40:1. Plugs are much easier to swap than if you start off to lean and blow the motor
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85 Polaris Indy Trail... 488 motor from ^
74 Polaris Colt... custom 440 motor from ^
89 Ski-doo Formula Plus (521)
92 Ski-doo Safari L (377)... still in diagnostics phase

praying for snow and for the packers
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