89 Safari Scout Restoration - Page 2 - Snowmobile Forum: Your #1 Snowmobile Forum

bakon · 01-04-2013, 09:33 PM

You should change the rubber on the carb, looks like its split bad. And soak that carb good!

**smallengineguy** · 01-05-2013, 06:34 AM

Hopefully you can get that carb clean! Definitely replace the boot too.

Corolla Sound · 01-05-2013, 09:00 AM

Thanks for the tip on using a chain on my exhaust to knock anything loose, god idea.

Yes, the rubber grommet/boot is fairly deteriorated lol. Though just now I took a rag and wiped it off and a lot of the deposits came out, but yes, its still starting to split and should be replaced.

I am going to start cleaning the carb today. Will be sure to share some pics

Corolla Sound · 01-05-2013, 10:38 AM

Here is my progress so far:

Corolla Sound · 01-05-2013, 10:40 AM

Corolla Sound · 01-05-2013, 10:42 AM

So before I even started with the carb cleaner, I used a small wire brush to clean out the heavy deposits starting with the drain plug first, after cleaning I noticed there is a hole in the plug. Is that suppose to be there (I wouldn't think so?)?

**RJ Gleason** · 01-05-2013, 01:15 PM

Nope, no hole should be there.
You're going to have to find a replacement.

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Polaris650freak · 01-05-2013, 01:17 PM

A good welder can toss a tiny plug weld on that.

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Corolla Sound · 01-05-2013, 06:24 PM

I didn't think there was suppose to be a hole there. I picked up some gas tank and radiator repair putty to do a quick patch. Never got to it though, it warmed up above freezing for a bit today so I took advantage of the time to remove the air box and do some cleaning. Ill share some pics soon. I found what I thought was a giant mouse nest behind the air box, but as I removed it, it seemed to be glued to the body, almost as if it was some sort of insulation/firewall for the gas tank??

Corolla Sound · 01-05-2013, 06:36 PM

What is all that stuff?

Polaris650freak · 01-05-2013, 06:39 PM

Looks like a mouse in the house

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Corolla Sound · 01-05-2013, 06:42 PM

Then I cleaned up the tape on the wire harness, then bolted the oil tank and support back in place and closed the hood (it was getting dark and cold). I also put a tarp over the sled in case it snows.

Now I have the airbox, the exhaust, and the carb all in the house nice and warm waiting to be cleaned lol

Corolla Sound · 01-05-2013, 06:45 PM

Eewwww, I used my bare hands to pull some of it out lol, but I also had to wash my hands twice in Varsol, then twice in dish detergent just to get all the grease off, so hopefully it got all the gross mouse nest germs off me.

Hopefully it warms up again tomorrow so I can keep hacking away at the remaining nest

Polaris650freak · 01-05-2013, 06:48 PM

Mouse nest won't hurt ya. Just might smell.

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Corolla Sound · 01-06-2013, 12:29 AM

Well, I was going to clean this, but I decided to build my own air box (maybe).

I would like to design a smaller air box so that it can be removed and installed faster. Any thoughts or suggestions?

**RJ Gleason** · 01-06-2013, 05:28 AM

The air box actually does a similar function as the expansion chamber of the exhaust.
It actually helps to push the air/fuel mix into the engine.
You can modify them some, but in general it's best to leave them alone.

Corolla Sound · 01-06-2013, 10:31 AM

Maybe Ill just use the original air box and save me some time in doing custom work lol.

Polaris650freak · 01-06-2013, 10:47 AM

Quote:

Originally Posted by RJ Gleason

The air box actually does a similar function as the expansion chamber of the exhaust.
It actually helps to push the air/fuel mix into the engine.
You can modify them some, but in general it's best to leave them alone.

That is so wrong. So your saying all 8 of my race sleds that don't even have pods or air boxes are not mixing the air fuel properly????. I don't think so. It's all in the carb and intake port. The intake makes a huge suction and sucks it's own fuel in. You could not run a air box on that sled if you wanted and it would run perfect but you would have to jet up and also you would be sucking in hot air as its a trail rider so it's like a catch 22 and you gain nothing. Now like my race sleds are all wide open carbs and are only running for a few minutes so the hot engine air doesn't effect it. But for your best interest it's best to keep it on there.

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**RJ Gleason** · 01-06-2013, 11:32 AM

I'm not going to hash this out again.
I can't find it now, but I had linked an article in another thread on this very topic that proved beyond any doubt that except in race applications, pods were actually costing power due to the fact that the airbox is designed as a resonant cavity to aid in fuel feed to the engine.
So, if you want to be a pain about it go and fine the post yourself and see if you can prove me wrong.

Polaris650freak · 01-06-2013, 11:36 AM

He wasn't going to run pods he was going to make a new air box. If he was running pods I would agree. But the air box does nothing on a trail sled except give it cool air. Race sleds are only running a few minutes so they don't have to worry about hot engine air. I'm not being a pain in the ass but I'm saying my thought from real world experience not someone else's Internet post.

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