Mid to Early 90's Safari's - Page 2 - Snowmobile Forum: Your #1 Snowmobile Forum

zilla600 · 11-10-2012, 08:56 PM

Well I got most of my parts that I need to put the fuel system back. The one thing that I havent found yet is the grommet that goes in the bottom of the oil tank. The Ski Doo part number is 572277400 and it says it obsolete on hsml website. Anyone have a cross reference (or an extra) to that part number? I found one on ebay, but it doesnt look to be exactly what I need and they say it is for wires.... Thanks Guys!!

zilla600 · 12-06-2012, 02:15 PM

She's Alive!!!!

But still we have some issues...

It seems that its only idling on one cylinder... once it gets warmed up and running for awhile it runs on both... also when initially trying to start i can use a 1/4 of a prime and it will flood out. and then I have to hold the throttle wide open until it fires up. any suggestions on what I could adjust to make it run properly when cold? i have the carbs set exactly as they were when i cleaned them.

Thanks to all! Snow is on the way soon!

zilla600 · 12-11-2012, 12:59 PM

Mr. Gleason, please help! I want to get these problems resolved before the snow gets here!!.

**RJ Gleason** · 12-11-2012, 04:20 PM

Set air screws to 1 turn out from bottomed and adjust idle screws to get 1500 to 1800 rpm idle.
That should help with the starting and idle.

zilla600 · 12-11-2012, 05:14 PM

Quote:

Originally Posted by RJ Gleason

Set air screws to 1 turn out from bottomed and adjust idle screws to get 1500 to 1800 rpm idle.
That should help with the starting and idle.

Thank You sir. I've been doing some other reading on here about other sleds having similar problems. Im going to pull the one carb off and re-clean it. Its possible that a piece of gunk from the gas tank made it into the carb. Plus it gives me something to do while i wait for ice and snow!
thanks again, your help is greatly appreciated.

zilla600 · 12-12-2012, 03:12 PM

Okay, recleaned the carb that is not to my liking.... also set both carbs at 1 turn out and that did assist with the starting, but still its only idling on the PTO carb. I can feather the throttle up and get it to fire on both, but it seems to me that it shouldnt do that. Any ideas - smallengineguy, Mr. Gleason?

Thanks for the assistance once again!

zilla600 · 12-12-2012, 03:59 PM

Quote:

Originally Posted by zilla600

Okay, recleaned the carb that is not to my liking.... also set both carbs at 1 turn out and that did assist with the starting, but still its only idling on the PTO carb. I can feather the throttle up and get it to fire on both, but it seems to me that it shouldnt do that. Any ideas - smallengineguy, Mr. Gleason?

Thanks for the assistance once again!

Okay, reread what Mr. Gleason said yesterday about adjusting the idle. One question, which is the idle adjustment screw and how does it get adjusted and is it okay to have one adjusted at one setting and the other at another setting? Also, I dont have a tach so im not sure how many RPM's im running.
Thanks to All!

**RJ Gleason** · 12-13-2012, 07:08 AM

They should both be the same.

**smallengineguy** · 12-16-2012, 07:37 AM

If it's only idling on one cylinder, that sometimes means that the nonfiring side has low compression. What are your compression readings?

zilla600 · 12-17-2012, 12:04 PM

Quote:

Originally Posted by smallengineguy

If it's only idling on one cylinder, that sometimes means that the nonfiring side has low compression. What are your compression readings?

130psi both cylinders. I have a feeling after talking to the neighbor that the crank seal on the mag side is bad. How difficult is it to change the crank seal on the fan cooled 377 rotax engines? I dont know if it would do any damage to run it the way it is right now, or would it be fine? Im not going long distances with it, but would like to know that it wont cause any damage if its riden as is.
I would plan on tearing it down next spring/summer and replacing all seals and gaskets along with the other ski doo and yamaha that need attention.

Thanks to All!

**RJ Gleason** · 12-17-2012, 12:51 PM

That is the cylinder base that the fuel pump runs from too.
If it clears up after rpms get up enough, then you might look at the fuel pump diaphragm. It might have a pin hole in it and is allowing gas into the base on that side.

zilla600 · 12-17-2012, 02:02 PM

Quote:

Originally Posted by RJ Gleason

That is the cylinder base that the fuel pump runs from too.
If it clears up after rpms get up enough, then you might look at the fuel pump diaphragm. It might have a pin hole in it and is allowing gas into the base on that side.

The Fuel pump diaphragm runs off of the PTO side (on this sled). I also rebuilt the fuel pump with a brand new kit while I had the tank and carbs off. It has sat for 12 years, so its very possible that a crank seal maybe going bad. Otherwise it runs great.

**RJ Gleason** · 12-17-2012, 03:02 PM

How was the mag side crank seal, is it new too?

zilla600 · 12-17-2012, 03:27 PM

Quote:

Originally Posted by RJ Gleason

How was the mag side crank seal, is it new too?

Okay. we have some confusion here. I havent replaced any seals on the engine. The pto cylinder starts and runs as it should. The mag side does not idle, but will kick in when the engine is revved up. I have rebuilt the fuel pump and cleaned the carbs. Is it possible that the mag side seal is bad and if so can i replace it without pulling the engine out of the sled?

**RJ Gleason** · 12-18-2012, 02:24 AM

Actually, you can if done carefully as these have a lip in the outer edge.

I'm thinking that per your description there are a couple of possibilities.
1. You may have a plugged pilot jet so that cylinder is not getting enough fuel to fire till it passes 1/4 throttle.

2. have you tried a new plug? An old one may not fire until there is an energy build up as the rpms go up.

zilla600 · 12-19-2012, 09:38 AM

Quote:

Originally Posted by RJ Gleason

Actually, you can if done carefully as these have a lip in the outer edge.

I'm thinking that per your description there are a couple of possibilities.
1. You may have a plugged pilot jet so that cylinder is not getting enough fuel to fire till it passes 1/4 throttle.

2. have you tried a new plug? An old one may not fire until there is an energy build up as the rpms go up.

It seems the pilot jet was plugged. What a relief! Now we need snow and icee!

Thanks for all the help Mr. Gleason.

zilla600 · 12-19-2012, 06:19 PM

Okay new problem, and I think I know what the problem is.

Brand new headlight... blown.... I havent burnt any of the other bulbs that I have replaced yet. but do you think its the voltage regulator? It is electric start and I do have a battery in it.

Thanks All

zilla600 · 12-27-2012, 05:24 PM

Does anybody know where the voltage regulator is on these safaris?

Thanks

**RJ Gleason** · 12-28-2012, 04:22 AM

Look behind the chain case above the foot well.
If it's not there, then look under the engine.