SS870 running funny

Nomad74

Boy Sprout
Joined
Feb 4, 2016
Messages
24,126
During the week my 870 has started to run a little funky. While on idle it is dropping in RPM then suddenly surges. I was able to be in the back of the van while this was happening. During the lag times, l could hear a light clicking in the exhaust toward the rear area of the TM. The engine would surge and then everything sounded normal. This would happen off and on. My guess is the plugs are starting to foul. After all, its been about three years, probably time to change them. Pulled them and they look a little cooked.

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Nomad74

Boy Sprout
Joined
Feb 4, 2016
Messages
24,126
If anyone needs a cross reference for the stock SS870 spark plugs. Here they are.

DE5BEE13-D116-470E-B745-AEF1A04048E1.png
 
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Mikey P

Administrator
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Oct 6, 2006
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Your inner conscious is drowning out the purr of the 870...


"Don't look Damon, don't LOOK!"
 

Nomad74

Boy Sprout
Joined
Feb 4, 2016
Messages
24,126
Those plugs were really bad. Change your air filter
How often do you change your oil Damon?

Just changed the air filter two weeks ago. I change oil every 200 hours in winter. 100 in the summer. Manual says every 200 hours, but we get really hot summers here (118° days) and that machine works hard.

She's running good now. Those plugs were ready.
 
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BIG WOOD

The Timminator
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Feb 4, 2016
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14,433
Name
Matt w.
Just changed the air filter two weeks ago. I change oil every 500 hours in winter. 200 in the summer. Manual says every 500 hours, but we get really hot summers here (118° days) and that machine works hard.

She's running good now. Those plugs were ready.
Show us in your manual where it says to change it every 500hrs
 

BIG WOOD

The Timminator
Joined
Feb 4, 2016
Messages
14,433
Name
Matt w.
My bad. I meant 200. It was 4 am when I wrote that. I keep my oil hours written down on a tag on my TM.
100 hrs should be the max hours on engine oil changes. If the manual says it or not.
 

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