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Looking for Polaris part # 3084143. Polaris calls it adaptor. Most of us would call it an intake or carb boot. I have two 350l trail bosses, both need this part to run for the season. I have tried lots of online part suppliers, no luck. Any help finding these would be really great! Thanks
 

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Looking for Polaris part # 3084143. Polaris calls it adaptor. Most of us would call it an intake or carb boot. I have two 350l trail bosses, both need this part to run for the season. I have tried lots of online part suppliers, no luck. Any help finding these would be really great! Thanks
Is this piece a rubber compound?
I've seen rubber antique car parts cast from Devcon Flexane 80 & 94 but urethane isn't gasoline compatible.

Sent from my AT100 using Tapatalk 4
 

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The 350 and 400 2 strokes, did share the same cases and a few other things.
Looking at the parts fiche, the '99 400 intake boot is still available, judging by the picture it LOOKS the same as your old one, they did change the angle on the head on the later years...., You may want to physically take your old part to the dealer or someone who has some knowledge in the old 2 strokers and ask if they will interchange.
check e-bay out ,for pictures and see if these look the same, on something like this, i'd hate to buy used but........you may have to.
 

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I needed a case gasket that was obsoleted. Checked with several dealers. One , can't remember which sent ma a list of dealers that showed in stock. Found a dealer with 2 and bought. Might see if your dealer is on that system. Just found info:

This is who gave me the dealer list

Tabitha Druso
David Allen Racing Motorsports
11995 N. Maple Island Rd.
Fremont MI 49412
231.924.2694
 

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It is a good possibilty that I have a couple of these. I have parted out 3 350l's and put all parts in a big box. I have another one that is somewhat together. I will see what I have.
Thanks
 

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I might. I forgot to check. Will respond back tomorrow.
 

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1993 350L 2X4 W937539 CRANKCASE and CYLINDER 2X4 350L W937539 3084143
1993 350L 4X4 W938139 CRANKCASE and CYLINDER 4X4 350L W938139 3084143
1993 350L 6X6 W938739 CRANKCASE and CYLINDER 6X6 350L W938739 3084143
1995 400L 2X4 W957540 CRANKCASE and CYLINDER 2x4 400L W957540 3084143
1994 400L 2X4 W947540 CRANKCASE and CYLINDER 2x4 400L W947540 3084143
1994 400L 4X4 W948140 CRANKCASE and CYLINDER 4X4 400L W948140 3084143
1994 400L 6X6 W948740 CRANKCASE and CYLINDER 6x6 400L W948740 3084143
1995 BIG BOSS 6X6 400L W958740 CRANKCASE and CYLINDER 6x6 400L - U.S. W958740, SWEDISH S958740 and NORWE 3084143
1993 Euro 350L 4x4 S938139 CRANKCASE and CYLINDER 4X4 350L S938139 3084143
1993 Euro 350L 4x4 S938139 CRANKCASE and CYLINDER 4X4 350L W938139 3084143
1993 Euro 350L 6x6 S938739 CRANKCASE and CYLINDER 6X6 350L S938739 3084143
1993 Euro 350L 6x6 S938739 CRANKCASE and CYLINDER 6X6 350L W938739 3084143
1992 Euro Trail Boss 4x4 S928139 CRANKCASE and CYLINDER 350 4X4 / W928139 3084143
1994 NORWEGIAN 400L 4X4 N948140 CRANKCASE and CYLINDER SWEDISH 4x4 400L S948140 3084143
1994 NORWEGIAN 400L 6X6 N948740 CRANKCASE and CYLINDER 6x6 400L, SWEDISH S948740 and NORWEGIAN N948740 3084143
1994 SPORT 400L W948540 CRANKCASE and CYLINDER Sport 400L W948540 3084143
1995 SPORT 400L W958540 CRANKCASE and CYLINDER Sport 400L W958540 3084143
1994 SPORTSMAN 4X4 W948039 CRANKCASE and CYLINDER Sportsman 4x4 W948040 3084143
1995 SPORTSMAN 4X4 W958040 CRANKCASE and CYLINDER Sportsman 4x4 W958040 3084143
1993 SPORTSMAN 4X4 W938039 CRANKCASE and CYLINDER Sportsman 4X4 / W938039 3084143
1994 SWEDISH 400L 4X4 S948140 CRANKCASE and CYLINDER SWEDISH 4x4 400L S948140 3084143
1994 SWEDISH 400L 6X6 S948740 CRANKCASE and CYLINDER 6x6 400L, SWEDISH S948740 and NORWEGIAN N948740 3084143
1990 TRAIL BOSS 350L 2X4 W907539 Crankcase and Cylinder Assembly 3084143
1991 TRAIL BOSS 350L 2X4 W917539 CRANKCASE and CYLINDER 350 2X4-Update 3084143
1992 TRAIL BOSS 350L 2X4 W927539 CRANKCASE and CYLINDER 350 2X4 / W927539 3084143
1992 TRAIL BOSS 350L 4X4 W928139 CRANKCASE and CYLINDER 350 4X4 / W928139 3084143
1991 TRAIL BOSS 350L 4X4 W918139 CRANKCASE and CYLINDER 350 4X4 - Update 3084143
1990 TRAIL BOSS 350L 4X4 W908139 Crankcase and Cylinder Assembly 3084143
1994 W948040 W948040 CRANKCASE and CYLINDER Sportsman 4x4 W948040 3084143
1995 XPLORER W959140 CRANKCASE and CYLINDER XPLORER 4X4 W959140 3084143

here are a list of models that part fits good luck
 

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This may get long winded. Damn engineers... :)

Assuming you can't buy one that fits well enough...
Is there a reason to not sand cast and then home machine an aluminum flange? Outside the obvious that fire and melted metal are dangerous... and everything a growing boy needs. :icon16: Scrap aluminum can be melted in a flowerpot using charcoal. Casting sand can be made using kitty litter, playground sand, and 2 cycle oil. Dave Gingery did it and I have too. You could do most if not all of the "machining" using patience ( something many folks lack ;) ), a file, a small pane of glass, sandpaper, and hand drill.

You could use fuel filler hose and clamps to couple the carb to the new cast and machined flange.

OR

You could cast the flange such that it's a slip fit over the hose barb end of the carb and useing a groove in the ID with an O-ring to seal over the hose flange on the carb... Similar to inserting an injector in the intake on a gasoline car. You might have to sand/file down the bead on the carb barb to make it slip inside the O-ring work.

Using either method you might have to move the airbox forward or back a bit.

I am unsure whether the Polaris or Fuji engineers used this flexible flange as a shock absorber for the carb. If they did... then a solid cast flange would defeat that purpose. It's something to think about.

There are castable Polyester Urethanes that I didn't know about when I made my first post in this thread. The Polyether based castables are less fuel and heat resistant than Polyester so I'd lean toward the Polyester stuff. All of these castable elastomers are industrial chemicals. Some contain nasty stuff like Isocyanates. Google "Northstar Polymers" keeping in mind that mere mortals may or may not be able to purchase them.
 

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Good day. I am also looking for a 1991 polaris Trail Boss 350L 4x4 crankcase. were you able to locate?
did another style fit and work?
Any help on this topic would be much appreciated.
Thanks Bunches
I beleive the 400L crank case is exactly the same. That I do have. 100.00 plus shipping. Not a complete lower end just the inner two engine cases. I know for a fact crank shafts are the same. I can text pictures if you need. I am sure if you look through the forums you will find out for sure if it can be done

Thanks
 
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