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post #1 of 11 (permalink) Old 02-22-2019, 04:46 AM Thread Starter
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Sitting for a few years

I just recently purchased 2 basically new Polaris snowmobiles. One is a 800 pro r and the other a 750 fst each with around 400 miles. They haven’t been started or used in a few years. They were stored in a new inline enclosed trailer the entire time. The previous owner said that he put fuel stabilizer in both machines when he parked them.
Besides draining the old fuel out of the tanks, is there anything else I should do before attempting to start them?
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post #2 of 11 (permalink) Old 02-22-2019, 06:42 AM
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Welcome!
If they are both EFI about the only thing is to look them over for mouse houses!
Air box and exhaust are likely?
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post #3 of 11 (permalink) Old 02-27-2019, 05:53 PM
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As said. Look for critters. Clean out nests and cobwebs. Look for chewed wires, hoses, cables. All good? Drain the gas tank completely. Rinse out. Drain the oil tank completely, rinse out. Pour in 1/2 tank of fresh new fuel and 1/2 tank of new oil. Open the fuel valve, turn on the ignition, pull the cord. Get it to light off. Take for low rpm rides around the property to get everything moving and turning. Stay close to home, walking distance. Once they prove to be runners, there are a bunch of things that will need attention before taking them out for a day of riding.

Start with the basics: Do they run as is? Get them to prove it first. Then put the time and effort into all the other things that will need to be done before deemed ride-ready.
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post #4 of 11 (permalink) Old 03-03-2019, 07:35 AM Thread Starter
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Got both sleds running without issues
New batteries
New gas
The 800 r was loaded up with oil and that eventually cleared out.
The fst however has a low speed/ decel clunking in the drive system.
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post #5 of 11 (permalink) Old 03-03-2019, 08:19 AM
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That could be the 4 stroke issue.
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post #6 of 11 (permalink) Old 03-03-2019, 10:10 AM Thread Starter
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The engine idles and runs fine, definitely in the drive line
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post #7 of 11 (permalink) Old 03-03-2019, 08:51 PM
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Sitting for a few years

For the low speed clunk. Check the drive belt. It probably has a burn out spot. Hour-glassed in one spot.

What are the model year of these machines?
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post #8 of 11 (permalink) Old 03-07-2019, 04:32 AM Thread Starter
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The fst is a 2012 and the rush is a 2013
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post #9 of 11 (permalink) Old 03-07-2019, 06:59 AM
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HMM those 2 sleds have had alot of talk!
Most dont like the 4 stroke.
The Rush got mixed comments?
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post #10 of 11 (permalink) Old 03-07-2019, 08:23 AM Thread Starter
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Im just getting back into the sport and thought I got a good deal on the package.
The four stroke is beginning to worry me but what I’m seeing is the longevity of the machine depends on care and maintenance plus the fact they can be difficult to work on
The rush rear suspension seems high maintenance but the rest of the machine seems legit
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post #11 of 11 (permalink) Old 03-07-2019, 03:15 PM
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The Rush rear geometry looks weird (especially to us mountain sled guys!) but from what I've read, it works great. You do lose any tunnel carrying capacity, but that's not an issue for the folks that buy 'em. You are very correct; long life in anything mechanical can be very dependent on maintenance. For the most part, the 4-strokes do outlast the 2-strokes in all the major brands. The FST is very comparable to a CFI 600 in performance, with a very small hesitation and a bit heavier steering.

Congrats on the sleds!

2017 SKS 800, 2007 Dragon RMK 700 155", 2008 RMK 600 155", 95 Prowler 550 2-up, Really OLD AC Cheetah

http://www.avalanche.org/accidents.php
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