1989 Phazer, need altitude carb setting info

[ttyR2]

Working on a 1989 Yamaha Phazer for a friend. Currently it randomly starts flooding out which points at the float valves. While I'm in the carbs, I want to make sure it's set up for the altitude where he usually rides, 5,000ft or so. The settings listed on the belt cover looks like they are for sea level. Do any of you guys have a manual that you could quote the elevation spec's out of?

The spec's call for a float level of 9.7mm (+-1mm). Which side of the float chamber surface is that measured from? The outer part is a different height than the inner ring, with the sealing ring between them.

 

[Bauer]

Float level should be 11-13mm, As far as jets @ 5000ft probably a 135 if it's below 0 or 130 if above. My opinion is they spec to lean.. I run 130's in both of the phazers I have at 10,000ft and the plugs look perfect. I'd try a 140 first, if it's fat go to a 135. HTH

 

[ttyR2]

One float was way out of whack (set too high) and that'd explain the flooding problem.

Next question, how do you set the oil pump cable on this engine? I don't see any marks or anything on the oil pump that would let me line up the base setting.

 

[ttyR2]

Got the carbs all back together. It looks like it has 137.5 jets in it. After letting it warm up, it can't even spin past 4500rpm with the track off the ground. Gently easing the choke on makes it bog so it's still gotta be rich, but can 137.5's be *that* rich?

 

[Bauer]

Did you put the carb plugs in the right holes? As far as the oil cable I have always tried to get as much as possible. IIRC the manual says there is a mark on the cable that you need to be able to see at WOT. I never found a mark, so I figured the more the better..


ETA:

FYI just incase

Pilot should be capped.. Let me go double check the Clymer manual..


Yup pilot capped. I think thats what throws people off. You would think the opposite.

Heres the breakdown Part #15 is the pilot #27 is the cap. HTH

http://www.gvpowersports.com/fiche_...ry=Snowmobiles&make=Yamaha&year=1993&fveh=567

Well that didn't work... But just select carburator in the drop down box and it will give you the detail.

 

[ttyR2]

Well that would certainly explain it. When I was blowing all the jets out after hosing things down with carb cleaner, those four (two per carb) black plugs blew out. I figured the jet needed fuel so didn't put plugs back on it.

 

[Bauer]

Ya those pesky lil things are pretty important..

 

[ttyR2]

I read elsewhere that one of the holes has the pilot jet (which you covered), one is the air bleed, and the third looks to be plugged (i.e. nothing in it). So I assume the one that has nothing in it doesn't need a plug. Correct?

 

[Bauer]

Yup.. The pilot and the "center" hole get plugged and the other is open.


If you look at the carb detail here http://www.gvpowersports.com/fiche_section_detail.asp you can see the plugs as to how they are placed in reference to the float..

 

[ttyR2]

Well that certainly did the trick. Let the sled warm up to an indicated 110deg on the exposed head (using an IR temp probe) and it had instant throttle response and ran the clutch through it's range.

I understand your comment about setting the oil pump, but I'd still like to have it done according to the manual. Where was this mark supposed to be that the manual talked about? On the carb end of the oil pump cable? And with the throttle pegged (engine off) you should see the mark?

 

[Bauer]

Manual says minimum pump stroke @ .15mm Max 1.8mm, could never really figure out what was best. So I just adjusted it to max on oil @ WOT by the cable tension... That may may be the wrong way, but I have 2 set the same, both approaching 4000 miles... And run strong.

 

[ttyR2]

Coming from a Polaris background, I have no frame of reference to how the oil pump setting works on the Phazer. With no marks, how can you tell how the pump is set? Currently, there are two threads showing below the steel bracket the oil pump cable screws into on the carb.

I also don't understand where the millimeter adjustment you mentioned comes in to play. Do you mean the cable is pulled out to within 1.8mm of it's max travel with the carbs at WOT?

Thanks for your patience

 

[Bauer]

Coming from a Polaris background, I have no frame of reference to how the oil pump setting works on the Phazer. With no marks, how can you tell how the pump is set?

Kinda frustrating huh

Currently, there are two threads showing below the steel bracket the oil pump cable screws into on the carb.

Thats probably about right. Somewhere in that silly manual it said to pull out the cable and there is a mark on it where it should be set @ WOT. I could never find one on either of mine. So they are adjusted the same as the one you are working on. Just a couple threads to hold it in place.

I also don't understand where the millimeter adjustment you mentioned comes in to play. Do you mean the cable is pulled out to within 1.8mm of it's max travel with the carbs at WOT?

Thanks for your patience

The manual goes on for about 3 pages talking about the oil pump and the adjustment. I'll go see if I can find a manual floating around and give you the link, if not I can check it Saturday. I'll be out of town for a few days..

 

[Bauer]

PM sent..

 

[#1Leaddog]

Oil pump

The mark is on the cable about halfway throught the cable. Two ways to check. One is with throttle closed the gap in the cable should be approx. 7/8 of an inch. The other and more accurate way is to hold throttle wide open and the punch mark should be just visible where the cable splits.