SBA 600 pipe temp sensor - HCS Snowmobile Forums

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Old 01-10-2020, 08:42 PM   #1 (permalink)
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Default SBA 600 pipe temp sensor

Ok been chasing an issue with my sled. Started at the end of the season 2 years ago, bought a new 850 last year so the 600 didnít get ridden due to a crappy winter. So now Iíd like to get my 600 running right again. Sled pulls inconsistent rpms, sometimes 8200 like normal, sometimes 7600, sometimes 77, 78, 7900 etc. Iíve gone through the exhaust valves twice, squeaky clean, all passageways clean, bellows good. Had a code for exhaust valve solenoid, checked solenoid with ohm meter, found it to be bad and replaced, code went away. Went through the clutches and replaced springs, cleaned inspected ect. New plugs, new fuel filter. Checked jack shaft bearings and drive shaft bearings thought maybe one was bound up, all good there too. Sled runs better but will still occasionally pull inconsistent rpms. Was doing some testing last night and narrowed it down to what seems to be a cold pipe issue. Ran it across the field (about 1/8 mile or a little more) pulled 7600 and slowly climbed to 8000. Turned around, whacked the throttle, 8150-8200, replicated it a dozen times. Shut sled off for 10min, tried again and 7600 and slowly climbed to 8000. Now after shutting it off coolant temp dropped (105ish vs normal of 125) so thought it could be coolant temp issue. To rule that out I pulled the muffler side, side panel, left it run and threw snow on the pipe, bam 7600 again and was able to replicate it every time. Before I spend $200 on a temp sensor that might fix the issue does anyone have resistance specs for the sensor? Has anyone else had an issue like this? Makes me mad because this sled has always ran very very strong for a stock 600.


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Old 01-14-2020, 08:27 PM   #2 (permalink)
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Join Date: Dec 2005
Posts: 3,143
Current Sled(s): 13 Indy, 01 600xcsp, 00 600xcsp
Previous Sled(s): 3 arcticcraps
Location: Central Mn
Favorite Riding Area: from my house
Age: 37
Riding Since: 85
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My 13 Indy has been 200-400rpm short off and on for 4-5yrs now. Doesnt really bother much since I ride like a grandma. Recently a code 173-3 popped up then went away. Pipe sensor high v. Im gonna replace it someday. A google search shows egt sensors are an issue with all brands and the cat guys can use a cheap egt sensor from a duramax.
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