how can you tell if your rmk is equipped with det ? - HCS Snowmobile Forums

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Old 11-15-2018, 07:46 AM   #1 (permalink)
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Default how can you tell if your rmk is equipped with det ?

got the 05 144 600 edge rmk.Not sure if it has it or not?
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Old 11-15-2018, 09:52 AM   #2 (permalink)
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I don't see a det sensor in the pics. Normally would be in the cylinder head.

https://www.partspitstop.com/oempart...-4992789278c12

Found it. Item #30.

https://www.partspitstop.com/oempart...-4992789278d06
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Old 11-15-2018, 11:49 AM   #3 (permalink)
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I don't see a det sensor in the pics. Normally would be in the cylinder head.

https://www.partspitstop.com/oempart...-4992789278c12

Found it. Item #30.

https://www.partspitstop.com/oempart...-4992789278d06
so it does have it.interesting.what exactly does it do to prevent detonation? retard timing?
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Old 11-15-2018, 12:13 PM   #4 (permalink)
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so it does have it.interesting.what exactly does it do to prevent detonation? retard timing?
Yes. And, it should light a dash light.
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Old 11-15-2018, 12:19 PM   #5 (permalink)
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Yes. And, it should light a dash light.
im at sea level and notice on my chart from polaris i could put 400s in from minus 1 to minus 12 c at sea level.

any concerns i should have additionally with the accs when jetting down?

I rarely see an ambient temp colder then minus 12.
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Old 11-15-2018, 12:32 PM   #6 (permalink)
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im at sea level and notice on my chart from polaris i could put 400s in from minus 1 to minus 12 c at sea level.

any concerns i should have additionally with the accs when jetting down?

I rarely see an ambient temp colder then minus 12.
ACCS should adjust automatically to reduce richness from the baseline. Normally, you need leaner jets for higher altitude, so why would sea level require leaner baseline jets? Is it because the baseline jet spec'd at higher elevation is much richer at colder temps?

I'd be cautious with this. Fuel quality and octane may be a factor here. Check plugs and piston wash at various throttle positions and distances.
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Old 11-15-2018, 01:26 PM   #7 (permalink)
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That sled did not come with ACCS so jet according to the chart for temperature and altitude. If you're comfortable with checking piston wash and reading plugs you can probably go a bit leaner as Polaris and all manufacturers were pretty cautious with jetting.
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Old 11-15-2018, 02:23 PM   #8 (permalink)
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Previous Sled(s): 03 zr 900/ 03 zr 800/99 mach z 800/03 vmax 600/95 vmax 500/
Location: mooseland
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19-20 Mileage:
18-19 Mileage: not enough
17-18 Mileage: not enough
16-17 Mileage: not enough
Age: 5
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Originally Posted by patrioticinnovations View Post
ACCS should adjust automatically to reduce richness from the baseline. Normally, you need leaner jets for higher altitude, so why would sea level require leaner baseline jets? Is it because the baseline jet spec'd at higher elevation is much richer at colder temps?

I'd be cautious with this. Fuel quality and octane may be a factor here. Check plugs and piston wash at various throttle positions and distances.
typically the jetting from factory makes the sleds here safe from 12 to 23 below c. its rarely below minus 10 here, so according to the temp chart at sea level there stating 400s to be safe?
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Old 11-15-2018, 02:28 PM   #9 (permalink)
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Current Sled(s): 2007 Dragon 700 ////05' switchback 600
Previous Sled(s): 03 zr 900/ 03 zr 800/99 mach z 800/03 vmax 600/95 vmax 500/
Location: mooseland
Favorite Riding Area: your sister
19-20 Mileage:
18-19 Mileage: not enough
17-18 Mileage: not enough
16-17 Mileage: not enough
Age: 5
Riding Since: 1990
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Originally Posted by retiredpop View Post
That sled did not come with ACCS so jet according to the chart for temperature and altitude. If you're comfortable with checking piston wash and reading plugs you can probably go a bit leaner as Polaris and all manufacturers were pretty cautious with jetting.
its not equipped with it ? the 05 service manual has a section on it ??
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Old 11-15-2018, 03:43 PM   #10 (permalink)
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its not equipped with it ? the 05 service manual has a section on it ??
The 550 Trail RMK was the only one that had ACCS. The service manual covers all models so that's why it is shown. The ACCS unit mounts on the airbox so it's easy to tell if you have it.
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