phazer stuck wide open

knee deep in it · Sep 18, 2009

ran good last year. This year, I changed the recoil rope. I put it back to gether and it fired up on the 5th / 6th pull full choke. It idled very high so I turned it off. I checked the carb boots and they look fine and they are seated correctly onto the airbox and carbs.

I adjusted the white knob (when in doubt, start messing with stuff) on the carb. Now it won't start at all. I returned the white knob to its origianal position but no luck.

Spark is good, it feels like lots of compression. I put a bit of gas down each cylinder and it ran for a second.

Before I rip apart the carbs, anything else to try?

SD Coyote · Sep 18, 2009

I have an older Yamaha that acted the same way last season. I always drain the float bowels at seasons end. The fuel pump allowed the oil to flow through from the oil tank and filled the fuel lines and float bowels with oil. I had to disassemble all three carbs, remove all jets, and use carb cleaner throughout. It worked great again after that. I would pull a float bowel bolt and drain the fuel in a clean cup to make sure gas is pure.

tard · Sep 19, 2009

I agree on the carbs, the other thing to check is the choke plungers. I have re done carbs on 4 Yammies this year, and 2 of them the choke did not return properly. A little lube on the plunger shafts fit it up.

bossmans kid · Sep 19, 2009

You need to clean your pilot jets and put new spark plugs in it. As far as the white knobs, (idle screws) have your local Yamaha dealer give you specs to get them in the right place.

knee deep in it · Sep 20, 2009

does anyone have the specs for the pilot adjustment screw - how many turns in?

ADRENALINE · Sep 20, 2009

knee deep in it said:
does anyone have the specs for the pilot adjustment screw - how many turns in?

Turn them until they are seated then back out 1 1/2 turns. It sounds like you need to take the carbs off and get them cleaned. These are very prone to plugging up the pilot jets, especially if they have never been cleaned.

arfrce · Sep 20, 2009

You said it has been setting for a year? I am sure the gas smells ok.
Also you said you poured gas into the carbs and then it started for a bit.
That is good.
Have you unhooked the gas line to see if it is flowing. Something could have stopped the flow from the tank. Or the oil pump
Could have gotten dirty fuel, Not sure if you have a fuel filter on your machine.
Hope you get it figured out.
Please let us know as you progress.

knee deep in it · Sep 21, 2009

updated, Thanks for the help so far

took the carbs apart, drained and cleaned. Put it back together now it starts right away. Problem is that it is wide open. This is what it was doing prior to not starting.

When I had the carbs off, I pulled the throttle and it opened and closed the flapper normally. It didn't stick at all. It isn't a stuck cable. When I pull it now, it sounds like it is opening the flapper.

Now what??

knee deep in it · Sep 21, 2009

I can't edit the title of the other thread so I am starting a new one.

1998 phazer, ran good last year. This fall, I got to start it and it is wide open. I kill the throttle then it won't start

clean the carbs now it starts but it is wide open.

The throttle seems to move the flapper in the carb body so I don't think the cable is stuck

any ideas?

whatryan · Sep 21, 2009

clean the crabs again u missed something and check cables

knee deep in it · Sep 21, 2009

the throttle cable opens the flapper, I can hear it moving inside the carb with the engine shut off.

If there is dirt or something in the carb, shouldn't it block the gas or air and make it hard to start or run slow / poor?

I am thinking of raising the track and then starting it. Then I can play with the throttle cable to see if it is sticking. Right now, the sled wants to rocket off because the track is on the ground.

My concern with this idea is a cold sieze.

ADRENALINE · Sep 21, 2009

knee deep in it said:
the throttle cable opens the flapper, I can hear it moving inside the carb with the engine shut off.

If there is dirt or something in the carb, shouldn't it block the gas or air and make it hard to start or run slow / poor?

I am thinking of raising the track and then starting it. Then I can play with the throttle cable to see if it is sticking. Right now, the sled wants to rocket off because the track is on the ground.

My concern with this idea is a cold sieze.

OK, Something is wrong here. It sounds like either something went wrong upon reassembling the carbs or possibly you forgot to unscrew the idle screw you originally turned in because it wouldn't idle?

arfrce · Sep 22, 2009

do like ^^^^above and check the idle screw if it is all the way it will be almost full throttle.

When you had the carbs apart did you do anything to the needle? Did you adjust it any?
Also stick your finger in the carb from the side to make sure the slides are moving crisp.

snowdad4 · Sep 22, 2009

knee deep in it said:
the throttle cable opens the flapper, I can hear it moving inside the carb with the engine shut off.

If there is dirt or something in the carb, shouldn't it block the gas or air and make it hard to start or run slow / poor?

I am thinking of raising the track and then starting it. Then I can play with the throttle cable to see if it is sticking. Right now, the sled wants to rocket off because the track is on the ground.

My concern with this idea is a cold sieze.

take the belt off, then it wont move and you dont have the potential for it falling off the stand and ghost riding. somewhere on the cable itself is an adjuster. should be a brass looking affair with nuts for adjusting, or a plastic sleeve if yours is a 2 into 1 cable. find this joint and make sure its together. sometimes after removing carbs it will hang. remove the cable from the thumb flipper and pull it by hand. should be about a 1/4" or more slack before feeling the slides. leave it unhooked when starting and see if it makes a difference. sounds more control than carbs.

knee deep in it · Sep 22, 2009

thank you guys. The throttle cable was too tight. It was always 3/4 open. I adjusted it as much as I can and it is perfect now.

BTW, there is a lot of clever engineering with these Phazers. No wonder they sold so many of them.

snowdad4 · Sep 22, 2009

your welcome. enjoy the old girl, seems as though they run forever. now, look into stretching her out to about 144.

arfrce · Sep 22, 2009

Good tech work guys. Thumbs up. :beer;:beer;

snowdad4 · Sep 22, 2009

arfrce said:
Good tech work guys. Thumbs up. :beer;:beer;

well, at least some of us have something pertinent to offer, unlike yourself.

arfrce · Sep 23, 2009

Read #13 again. That last line in particular.

knee deep in it · Sep 23, 2009

it is running good and I cleaned it up. A real nice example of this sled.

phazer stuck wide open

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