Phazer II Help

S

slumlord

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Joined
Nov 15, 2012
Messages
11
Age
62
Location
Bay City Michigan
Completely stumped please help. I have a 94 phazer that runs on 1 cylinder (mag side) can't seem to figure it out. I've done all the normal things that other threads suggest to do. Clean carbs, clean carbs, clean carbs, yea done that 3 times. cut the spark plug wire back a 1/4 inch,change spark plugs, change spark plugcaps, sync the carbs, all to know avail. :o| Did a compression check, has compression of 145 mag side 105 pto side. AAhhh theres the problem,its gotta be the crank seals...replaced them ;) ! ...nope. :o| well maybe that bore looks suspect? ok bore it new pistons yea thats it ;)! aahhh nope :o| Has anyone had this problem and what was the fix??????
 

What is the compression now?

Is that plug wet or dry?

Ground a spark plug to the PTO head - I think there is a screw on top that goes into the head or use a jumper wire - and check for spark.

Remove the plug and dump about a shot glass full of gas into the cylinder, replace the plug, start the sled and see what happens.

Remove the Y pipe and check for a mouse nest in that side.

Leave the air box disconnected from the carbs and try it.
 
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will not run no fuel ..........carbs ............check the floats and make sure they are not sticking............the aluminum tabs bend very easy and can give problems
 
In answer to PZ 1: I believe the plug was wet.(from memory) trying all kinds of solutions.The compression from the start, thru all changes remains at 105 on the pto side and 145 on the mag side. Tried having it run at 3k for 30 minutes.I've tried switching the head gaskets,i switched the reed cages, i put the mag head on the pto side, did compression check, had a little higher reading 111. i would not thinks its the carbs? Due to the main issue is low compression, is the thought process gas is washing oil away and giving lower compression reading? I've read about people complaining about pazers running on 1 cyl until some said rpm of 4ish thousand and then it picking up running ok and then dropping the cyl again at low rpm.Problem is no one seems to come back and say what the problem was? Thanks for the ideas guys
 
when you changed pistons i am assuming you got new rings. have you made sure the gasket at the base of the cylinder is in good shape?
 
The tors is disconnected. You cant switch spark plug wires, the mag side is to short to reach the pto side and they don't disconnect from the coil.
 
I am having a very similar issue with a 91 venture with the 480 fan in it. although I get much better compression readings. pretty interested to see this resolved :) mine seems to run ok at idle and starts to miss hard at the 5k rpm mark, is yours this way as well?
 
jets fallin out?

If you start the sled, and pull the boot from the plug on the PTO side, does the sled still run? What if you give it full throttle? Could your pilot or main jet have fallen out of the carb, and is now sitting in the bowl? Happened to a buddy of mine on his dirtbike... main jet fell out... he tends not to overtighten anything tho...
 
for mine, I can pull both plug caps (one at a time, obviously) and it will still run. pto side seems to be a lot less of a difference. mag side and it really starts to run rough. strange thing is that if I pull the plugs out and check them for spark it looks to be getting plenty
 
slumlord said:
The tors is disconnected. You cant switch spark plug wires, the mag side is to short to reach the pto side and they don't disconnect from the coil.
Click to expand...

Slumlord,

You can switch your wires around. Unscrew your ignition coil from engine. Then take a jumper wire with alligator clamps on both ends an attach one end to screw hole of the ignition coil and the other to the engine to complete the circuit. With that done, you can switch your wires around no problem.
 
reply for 03viper haven't rode sled to check performance at higher rpm. but the throttle response without the belt, seems slow to about 4k ish then it it picks up.I have reved it to 7k and it dosen't mis.

stanage at idle if you remove the pto plug wire cant tell much difference. if you remove the mag spark plug wire at idle it wants to die rather quickly and prolly half the time it does and half the time it will stay running but at under 1k rpm. ill have to check the main jet see if its in? I had them both out during cleaning and re installed with reassembly.

dangerous dan I'll try the remote coil hook up to see if it makes a difference.
 
03viperguy yes, they sound very similar and I've read of the non running cylinder at idle (usually pto side) on other web sites. What compression #'s are you getting. I had a 76 merc sno twister (kohler 440)that had a similar problem. It turned out one of the 2 coils, had cracks in the plastic casing, that the spark was escaping thru with a spark plug in the cylinder.
 
wow, I have a 76 TRAIL twister with a the same issue, but it is dead coil and a weak stator lol! we are a bit too similar with our sleds. dont have another one with a dead crank, do you? ;) compression I am getting is like 135 and 145, plus or minus a few lbs
 
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