1997 ski-doo forumla 3 carb specs needed - Snowmobile Forum: Your #1 Snowmobile Forum
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post #1 of 14 (permalink) Old 01-11-2010, 02:17 PM Thread Starter
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1997 ski-doo forumla 3 carb specs needed

hey guys my dad just bought a 1997 ski-doo formula 3 600 with a stinger exhaust on it but it was way too loud..so we put the stocker on it but its getting a flat spot in it. which is from half to 3/4 throttle which tells me the needle height or needle might be wrong, what im looking for is what should it be running stock for needle's main jets pilot jets and the how many turns out on the air fuel screws. it was running on the rich side before we changed the exhaust because if it idled for a few mins or low revs it would foul plugs.i tried finding the manual but seems its only the welcome part of it all i really need is the specs.


oh and i myself run a 90 cougar
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post #2 of 14 (permalink) Old 01-11-2010, 02:47 PM Thread Starter
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the needles in them are 6DEY4's is that the proper needle? it was on the third clip
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post #3 of 14 (permalink) Old 01-11-2010, 04:28 PM
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its the right needle. the 4 on the end of the # is the stock location. the air fuel screws should be 1 1/2 out. what plugs you runing? try the stock plugs.
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post #4 of 14 (permalink) Old 01-11-2010, 04:37 PM Thread Starter
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his sled is running ngk br10ES's i know the carbs are alittle on the rich side...now i just gotta figure out how to get at the air fuel screws :P looks like you have to tear half the sled apart just to adjust them...if anyone hasd any tips or tricks im all ears
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post #5 of 14 (permalink) Old 01-11-2010, 04:41 PM
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yes you got to take the air box out to adjust them. those plugs are the right ones
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post #6 of 14 (permalink) Old 01-11-2010, 04:58 PM Thread Starter
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ok thank you
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post #7 of 14 (permalink) Old 01-11-2010, 06:17 PM
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Use a very short screwdriver.

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post #8 of 14 (permalink) Old 01-11-2010, 08:46 PM Thread Starter
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Thanks RJ...i actually have alittle custom made carb tool kit i use for working on my motorcycles which has worked on the other sled i have a custom made flat head screw driver thats about 2 inches long
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post #9 of 14 (permalink) Old 01-12-2010, 06:38 AM
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BR9ES plugs are suitable for that sled as well.

1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month! (Lost in fire 4-7-13)
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post #10 of 14 (permalink) Old 01-12-2010, 03:18 PM Thread Starter
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well i took the air box off checked the air fuel screws they were perfect so i was looking at the throttle postion screws an when your sitting on the sled the right hand cylinder throttle position screw was way out soo i got it set seems better i threw a set of br9es that i had here in it and well she is performing like a top im going to sync the carbs tomorrow but just wanted to thank you guys for all your help...might be getting another sled tomorrow :P nothing like having a choice between 4 sleds that are sitting in the yard oh btw i creeped this site for a long time just decided to check now
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post #11 of 14 (permalink) Old 01-12-2010, 03:21 PM
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Quote:
Originally Posted by dpasch View Post
Thanks RJ...i actually have alittle custom made carb tool kit i use for working on my motorcycles which has worked on the other sled i have a custom made flat head screw driver thats about 2 inches long
I have several of those.

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post #12 of 14 (permalink) Old 01-13-2010, 05:24 AM
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Originally Posted by dpasch View Post
well i took the air box off checked the air fuel screws they were perfect so i was looking at the throttle postion screws an when your sitting on the sled the right hand cylinder throttle position screw was way out soo i got it set seems better i threw a set of br9es that i had here in it and well she is performing like a top im going to sync the carbs tomorrow but just wanted to thank you guys for all your help...might be getting another sled tomorrow :P nothing like having a choice between 4 sleds that are sitting in the yard oh btw i creeped this site for a long time just decided to check now
Glad we could help!

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post #13 of 14 (permalink) Old 01-13-2010, 03:37 PM
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Originally Posted by smallengineguy View Post
BR9ES plugs are suitable for that sled as well.
So which plugs are better suited to the stock set up for the '96 FIII. The BR10ES or the BR9ES. I have the BR9ES in right now. Fouled one the other day pulling the kids around on a sled at low speed. I know better but the kids were right into it so....

Mike
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post #14 of 14 (permalink) Old 01-13-2010, 04:56 PM
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i like the 10 better
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