87 Phazer running rotten! - Page 2 - Snowmobile Forum: Your #1 Snowmobile Forum

Gunner · 02-03-2008, 05:49 PM

Well nothing I did helped.. Figures...

It ran fine for about 3 miles and started gettin all mouthly and hatefull.

Took it to my yammi guy.

We're thinkin a weak fuel pump. Or air gettin in somehow, or or or...

He mentioned that the diaphram inside the pump given wear/age can cause all kinds of problems.

I'll chime in with the results.

wjdunlop · 02-05-2008, 02:54 PM

Gunnar:

It sounds like you have the same kind of "stuff" happening. Keep us informed of your progress. It could be a fuel pump, but in my case it seems to deliver lots of fuel at high speed. If you feather the choke, does it run OK?

Gunner · 02-06-2008, 10:49 AM

Wifeys runs fine WOT as well.. But if you let off at all it dies. It just kept getting worse and worse. To the point where she pretty much had to ride with one hand on the choke just to keep it running..

(so yes if she feathered the choke it ran great)

I haven't heard anything yet. I'll give em a call and check today..

**RJ Gleason** · 02-06-2008, 02:12 PM

If you have to keep "working the choke" to keep it running at idle/low speed, clean the carbs, the idle circuit is partially or completely plugged.

Gunner · 02-06-2008, 08:57 PM

Quote:

Originally Posted by RJ Gleason

If you have to keep "working the choke" to keep it running at idle/low speed, clean the carbs, the idle circuit is partially or completely plugged.

Thats the kicker.. These carbs spotless.. Yammy guy agreed.. (I spent a lot of time cleaning them)

Update from yammy guy:

1) secondary not quite right but probably not the culprit.

2) Very deep snow maybe getting on exhaust pipe (causing steam) Steam is more dense and could be leaning it out

3) This one got me thinking instead of using clamps the feller I bought it from used wire and twisted it tight to seal the fuel line..(on the pump where my hands don't fit, possibly letting air in when it warmed up) They found air in that line.. A good maybe on this one.

4) while the pump tested out ok with mouth pressure it's still is 20 years old and I have no idea how long it sat for..

So it has all new fuel line, and I'm having them throw a pump in it (so I don't have to)

I saw the wire on the line and thought nothing of it.. But in hindsite the wire does cut into the line. A cut line is bad.. Even if it just sucks air just a tad.. (or so I'm told)

**RJ Gleason** · 02-07-2008, 09:07 AM

Better to use zip ties instead of wire.

Let us know how it comes out.

JR36_86phazer · 02-08-2008, 10:04 PM

Hi there: replace the pulse line going from brass nipple on bottom of crankcase to fuel pump. This gets old,cracks and sucks air. Its 1/4" black rubber fuel line, good to replace each year or two because of the different temp changes underhood. Also use good quality fuel line like "Tygone" it comes in different colours but never dries out or cracks and its awesome in extreme cold temps I redid my whole sled in it oil lines as well..Take the boots off between carbs and motor.Inspect closely if they are old they crack too and suck air,i just replaced mine very cheap $22. each. I've just done a complete engine overhaul on mine..brand new crank,20 over pistons,newer rebuilt carbs. Fingers crossed putting it in tomorrow morning!!!

by the way ..NEVER use quick start or any kinda starting fluid it will blow the motor BIG time.

happy sledding !!

Gunner · 02-09-2008, 03:50 PM

Alrighty got the sled back, the shop really couldn't come up with anything.. So being stubborn like I am

I decided to give it another once over and while doing so I noticed air bubbling through one of the lines. The feller that I bought it from got rid of the oil and fuel guage lines so I figured it was one of his inventions....

NOPE

It was the tank vent..

He routed it out of the top of the tank then down towards the brake then up over the airbox.. Call me crazy, but if the vent line has gas in it, it might as well be pinched shut.. So I'll find out tomorrow.. But I'm pretty confident that was the problem. There was about 3" to 4" inches of line at the bottom of the loop filled with gas.

JR36_86phazer · 02-09-2008, 08:28 PM

That is a vent line its nornal..mine has it too.I saw it today. It comes out down by your left foot ..correct? Your sled have guages on right side about where your knee is?. should be oil and fuel guage there with a light behind it.It acts as an overflow/vent but there shouldn't be that much gas in it! If possible shorten it up or raise it high as you can... I got my motor in today,ran into a few snags nuttin serious. I will hook up electrical tomorrow,ran new carb lines and fuel filter today as well as new oil pump lines. Always use zip ties as wire can slice into lines and create air in the lines. will give an update Monday night when I hope to fire it !!

Gunner · 02-10-2008, 06:58 PM

Well wjdunlop.. My problem was the tank vent, flogged on that thing all day didn't even sputter

I routed it where it was supposed to go and it ran flawless. It may be a long shot but you might give yours a check. It may be pinched or clogged who knows.

Edit: O ya and they didn't replace the pump... They didn't have one and I didn't feel like waiting another week for it to show up..

wjdunlop · 02-19-2008, 07:50 PM

Gunner:

Thanks for the heads up. I'll check the vent when I get back up North. I'm now in Ft. Meyers enjoying 80 degree weather.

Bill Dunlop

wjdunlop · 03-10-2008, 09:00 AM

Gunnar:

I'm back in cold country. We just got dumped on to the tune of 2 feet this weekend. Temp is minus 25 C (-13 F). Will be buried in paperwork for a day or two. I'll have a look at the vent line this weekend if we get to the cottage. My machine is like new looking, and has the fuel and oil gauges as original. Where is the vent line routed? Do I have to pull the tank cover to get at it?

It was 85 degrees in Ft Meyers on Thurs when we headed north. When we arrived here last night it was 0. I think I prefer the PWC's at this point.

Gunner · 03-12-2008, 09:55 AM

Quote:

Originally Posted by wjdunlop

Gunnar:
Where is the vent line routed? Do I have to pull the tank cover to get at it?
.

The vent comes out the top of the tank, then runs under the plastic below the headlight, then down by the secondary. You can probably just blow through the end by the secondary with the tank open.. If it's not clogged or pinched. You may check the plugs in the bottom of the carbs. Make sure the pilot jet has a plug over it.

wjdunlop · 03-16-2008, 02:09 PM

Hello Gunnar:

I have yet to get into the cottage to access the machine, but I'll sure check out the vent when I do. I'm pretty sure the plugs are in the correct position in the carbs, as I installed them according to the parts explosion for the carbs. I'm starting to get restless about firing up the Sea Doos.

Bill Dunlop

wjdunlop · 05-29-2008, 08:06 AM

After putting on a grand total of 8 Km's I put the rotten running Phazer away for the summer again, and now have the PWC's out of storage. Before putting the Phazer away, I pulled the fuel pickup, and checked the vent lines, and fuel lines. They looked ok, and the machine seemed to run OK when I ran the stabilizer through it. As for water in the gas, I doubt it, as I usually run a little alcohol in the system (Gas Line Antifreeze) just in case there is condensation from the summer storage.
Thanks to you all for trying to help. We'll see you in December.
Bill Dunlop