2 stroke 2 cylinder
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
If you have wet plugs, there is too much fuel. Try starting it with the choke off and the throttle open.
Also remember that the engine is jetted a bit on the rich side for cold weather operation.
Also remember that the engine is jetted a bit on the rich side for cold weather operation.
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Post Fiend
Joined: Jan 2004
Posts: 5,377
Likes: 2
From: Elkhart IN
well crap i screwed up, i pulled the what i thought was the bowl drain, but on this is the fuel jet. i thought maybe when i switched gas tanks there was some water in the line, so i was going to drain the carb and screwed up. not sure where to put it now, the further in i go with it the more fuel it puts out. if i put it way in, the fuel actually bubles out of the tube in the carb where its supposed to spray. if i take it out some, i dont get anything. what gives?
Elder User
Joined: Dec 2001
Posts: 800
Likes: 0
From: Ontario, canada
Does the odyessy have a fuel pump, or is it gravity feed?
Snowmobiles run a fuel pump, either separate, or integrated into the carb.
Most motorcycles and ATVs are gravity fed.
Gravity feed carbs need a different needle/float configuration than fuel pump systems.
Take a look at the fuel system on the snowmobile and see if it has a fuel pump, or needs a return line to the tank from the carb.
Snowmobiles run a fuel pump, either separate, or integrated into the carb.
Most motorcycles and ATVs are gravity fed.
Gravity feed carbs need a different needle/float configuration than fuel pump systems.
Take a look at the fuel system on the snowmobile and see if it has a fuel pump, or needs a return line to the tank from the carb.
Cargo Master
Joined: May 2003
Posts: 2,561
Likes: 1
From: Earth
Originally Posted by chrono4
the odessy was gravit i beleive, and the snowmobile doenst have a pump, just runs straight into the carb.
Cargo Master
Joined: May 2003
Posts: 2,561
Likes: 1
From: Earth
I think that sled would be somewhere in the mid to late 70's. I don't know where they put the vins on those, but you might check the tunnel on your sled near the foot wells and see if it is in that area, and you might find the year on the tag. I would deffinately check those sites that I listed and see if you can get some help with it. Good Luck!
Elder User
Joined: Dec 2001
Posts: 800
Likes: 0
From: Ontario, canada
GP440 would be from 1976 and GP 440A would be 1977.
You can see an exploded view of the carb here
http://www.yamaha-motor.com/sport/parts/home.aspx (this is a great site for any yamaha, btw)
Looks like a diaphram type carb rather than a float bowl type.
The fuel pump is built into the carb, and operates by pulses from the crankcase.
You can see an exploded view of the carb here
http://www.yamaha-motor.com/sport/parts/home.aspx (this is a great site for any yamaha, btw)
Looks like a diaphram type carb rather than a float bowl type.
The fuel pump is built into the carb, and operates by pulses from the crankcase.
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Post Fiend
Joined: Mar 2004
Posts: 24,418
Likes: 3
From: San Francisco, Ca.
Those things were 
fun .
My old 81 FL250 had an Elsinore head and some other minor trick stuff.
I could get only about 65 mph out of it on pavement; less on dirt because of the lack of a rear suspension; but still fun.
Heard of someone back in the mid eighties who supposedly dropped a Kawi Ninja 900 engine in an FL350.
fun .My old 81 FL250 had an Elsinore head and some other minor trick stuff.
I could get only about 65 mph out of it on pavement; less on dirt because of the lack of a rear suspension; but still fun.
Heard of someone back in the mid eighties who supposedly dropped a Kawi Ninja 900 engine in an FL350.
Fleet Mechanic
Joined: Jan 2005
Posts: 1,413
Likes: 14
From: cape may county NJ
How is the coil mounted I know the hondas coil was mounted to the frame ,do you have a good ground coming from the motor to the frame spark should be nice and blue not white could be week under compression.what year was the oddy I was almost positive it had a fuel pump but its been about ten yrs since I worked on one and it was a fl250.
Last edited by GlennFordx4; Jun 12, 2006 at 06:59 AM. Reason: add more info
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Post Fiend
Joined: Jan 2004
Posts: 5,377
Likes: 2
From: Elkhart IN
i have no idea on the year, the engine that came off of it wasnt stock, and it was gravity fed. the coils on the yamaha are mounted to the block, and i hooked up the ground that came from the wire harness on the 440.
Post Fiend
Joined: Mar 2004
Posts: 24,418
Likes: 3
From: San Francisco, Ca.
I just remembered that when I had my 81 FL250, it had the pull the rope to start garbage.
Everytime I killed the engine, I had to put my beer on the cage, unbuckle my Diest safety harness, get out of my comfortable cushioned seat, climb out of the roll cage, and pull that dam rope alot to get it started.
So I installed an electric starter form some company called Goki.
Now I could kill the engine, enjoy the views, take a nap, start the engine with a push of the button, all without letting go of my beer.
Life was good.
Everytime I killed the engine, I had to put my beer on the cage, unbuckle my Diest safety harness, get out of my comfortable cushioned seat, climb out of the roll cage, and pull that dam rope alot to get it started.
So I installed an electric starter form some company called Goki.
Now I could kill the engine, enjoy the views, take a nap, start the engine with a push of the button, all without letting go of my beer.
Life was good.