When to Freshen Top End on Polaris

I've got about 4000 miles on my RMK 600. Compression is still right at 130 on both cylinders, and it runs like new. I know B. C. Dan blew his 700 a few years ago, and I'd prefer to freshen the top end to prevent that if others have had problems. I haven't heard any problems with the 600's, just wondering. AC's I've had seemed to need freshened at 3,000.

When to Freshen Top End on Polaris

How many miles approximately should I get out of 1 tank of oil?

I was wondering about how many miles I should get out of 1 tank of oil? I have a 1999 ski Doo mach z 800. I am new to snowmobiles so I am just curious. Also how many quarts does my oil tank hold on my sled? I just ordered 1 gallon of ski Doo XPS full synthetic oil and I'm wondering how long it should last. Thank you

How many miles approximately should I get out of 1 tank of oil?

Possible overheat with 4 stroke

So I just picked up an Arctic Cat 2002 4 stroke Touring. It started up great when I was looking at it, but we couldn't find the spark plugs to save my life (was beginning to wonder if it was a 4 stroke diesel). The oil & the crankcase oil both were clear and new looking. The owner said he had it professionally summerized 2 years ago. Beyond the missing spark plugs, the only thing wrong with the engine I could see was that the plastic belt guard had melted off its mounting bolts.

Once I got it home, I discovered the integrated coil - spark plug business and the plugs were quite oily and blackened. The compression was great - about double or more what I was seeing on my two strokes & consistent between all three cylinders. Then I noticed there was no antifreeze in the overflow tank, or any visible when I opened the coolant cap. It was wet though, so there had to be some AF in there.

So my theory is that either there is an AF leak, or when it was Summer-ized, they drained the coolant and forgot to refill it. Then in the intervening years the owner or his kids ran it for awhile where it got hot enough to melt the belt guard and when it stank of burning plastic, they (hopefully) shut it down and put it back on the trailer.

Anyway, I'm not sure what to make of the fouled plugs - could be fogging oil, or some sort of oil injection business when you first turn the key and have to wait while some electrical motor or pump does something (like waiting for glow plugs. :) ). Not at all sure what that wait is about.

Most importantly, I'm wondering what else I should look for? For sure I'm going to make sure there isn't a coolant leak. The oily plugs will take care of themselves perhaps once it runs for awhile. Is this something I really need to bring to a dealer/mechanic to verify it's all ok?

I appreciate any/all advice you can send my way. I'm reasonably mechanical - more so with 4 strokes than 2 strokes - but there is a limit what I can do without a decent shop/tools/patience. :dunno:

Possible overheat with 4 stroke

New member

Hello everyone from the Great State of Wyoming. New to the forum but having been riding for years and then quite and about 5 years ago started up again. Bought a couple of old machines just to get in and out of our cabin. They worked good for that but we decided to upgrade some so we could enjoy riding on and off the trail. Just bought two (new to us) 2007 Rages with 600 miles on them. Think they will work good for what we want. We mostly ride in the Black Hills of Wyoming and SD, so if you ever get this way let me know and maybe we can take a spin together or if you need any information about riding the Hills or the Big Horns let me know.
Steve

New member

Enticer engine swop

I have recently acquired a Yamaha 400ss engine and wounder if it will fit in my Yamaha ET chassis? Or if anyone has swopped there 340 for something bigger? Thanks

Enticer engine swop

Just got very first sled.

Just got my first snowmobile. I have a few questions because I know very little about these things. 1st it's a yahmaha exciter 570 and I'm not sure exactly what year it is. It has 61xx miles and not sure but I hear that's alot. I got it for little next to nothing and to me at least seems to be in pretty ok condition. Also the carbs appear to be missing a couple houses cuz there are two ports on top of each carb that aren't connected to anything. I will post pictures of that and the whole thing. Other than that if I can get it running will it be a decent sled? I appreciate any and all input feel free to add other information also. Thank you.

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Just got very first sled.

90 Polaris 400 - no spark

I replaced my 400 single seat with a dual seat/backrest. Local repair guy said the brake light sending unit was failing, and that he had a unit I could use, but required me to actually cut the wires and then add female connectors so they'd mate to the male connectors on the replacement unit.

The brake light worked for a while, but at the end of this '16 season I noticed it wouldn't start up anymore. I let it sit a few months, then pulled one of the plugs with the wire attached and definitely saw no spark. I even held the spark plug to the cylinder head to see if that would change anything, but didn't.

Any recommendations on root cause? Would it be the CDI ignition assembly, the stator, the regulator, other? Could my rigging of that brake light switch have caused one of the electrical units to fail?

My manual 15335026-Polaris_Download_1985_1995_Snowmobile_Service_Manu al_Repair.pdf gave me the following:

- Spark plug(s) fouled (can't be; new plugs/checked clean)
- Secondary coil bad or wires disconnected (not sure on this one)
- Primary coil shorted or open (how to check?)
- Ignition points pitted or dirty (how to check?)
- Ignition switch shorted (how to check?)
- Auxiliary switch (how to check?)

I do have a current tester with the pointed end, light and clamp. I also have an Actron CP7672 AC & DC voltmeter with the red/black leads.

All the lights, displays, and even hand warmers worked fine.

Attached is a schematic screen shot.

Thanks, Eric in Slinger, WI.

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90 Polaris 400 - no spark