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Discussion Starter · #1 ·
Happy New Year Ya'll. I have a '02 Grizzly 600. Here's the story. I had problems with it starting. One day it would fire right up, the next day it wouldn't. I was working for FedEx during the christmas rush so I took it to a Yamaha dealer. They took a bunch of my money but didn't fix it. I plowed snow one day, 3 days later I start it to take it to my other job to push snow and as I got it on the trailer it died, and 2 days later I still can't get it started. It cranks fine, just won't fire. I'm not all that mechanically inclined, and I'm short on time to fiddle with it, any ideas of what to look at would be great. Thanks much

Fishdaddy
 

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Happy New Year Ya'll. I have a '02 Grizzly 600. Here's the story. I had problems with it starting. One day it would fire right up, the next day it wouldn't. I was working for FedEx during the christmas rush so I took it to a Yamaha dealer. They took a bunch of my money but didn't fix it. I plowed snow one day, 3 days later I start it to take it to my other job to push snow and as I got it on the trailer it died, and 2 days later I still can't get it started. It cranks fine, just won't fire. I'm not all that mechanically inclined, and I'm short on time to fiddle with it, any ideas of what to look at would be great. Thanks much

Fishdaddy

Sounds like your not getting fuel consistently. I would take it back to the dealer and insist they are going to fix it for free since they didn't get it right the first time. If you want to try it yourself, start with the easiest first. Make sure you have fuel in the tank of course. How old is the gas? I'd start with the petcock after that (the fuel on off switch under the tank). turn the fuel off and take off the hose at the petcock and see if you get fuel to flow out when you turn it to the on position and the reserve position. I'm not sure if there is any kind of fuel filter on the 02 600. I'm not as knowledgeable as some here on atvs, but any engine displaying what you are describing sounds MOST like a fuel issue. Like I said, I would throw a hissy fit at the dealership and tell them to get it right.
 

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First we need to figure out which model you have, a 600 or a 660?
In 2002, there was no 600. It was only available 1998-2001.

In 2002 the 660 became available.

If you do indeed have a 600, then you have the classic signs of a bad Pulse Coil. Check it's resistance. I bet it's out of limits. If I remember correctly, the tolerance is 420-560 ohms.
 
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Discussion Starter · #4 ·
My mistake Dezz, it's a 2000 600. Only has 610 miles, all hard though either pulling a load of wood or pushing snow. It's been a great work horse till now. Thanks for the help and again my mistake.
 

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Hey Grizzpy, don't think these guys care what I say or think. They are in Dayton, Ohio and I think I figured out they work on motorcycles. They do have a ATV out front but from talking to them, don't think they know what to do with this animal. When I took it off the trailer two guys stood there for a long time just staring at it. I should have put it back on the trailer then and left. Live and learn. An expensive education.
 

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Hey Grizzpy, don't think these guys care what I say or think. They are in Dayton, Ohio and I think I figured out they work on motorcycles. They do have a ATV out front but from talking to them, don't think they know what to do with this animal. When I took it off the trailer two guys stood there for a long time just staring at it. I should have put it back on the trailer then and left. Live and learn. An expensive education.
Yeah we've probably all been there at some point. I actually went to school to become an auto mechanic many moons ago. I would only let about 3 out of the 30 people in my class ever touch any vehicle I owned. Most of them just wanted to learn how to build big powered engines. They could care less what they actually needed to know to work on someone's vehicle.
 

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Make sure there is gas and the valve is on. Many have turned the valve to off and ran the carb dry, then forgot to turn on the gas.
If it cranks but does not start, pull the plug to see if wet or dry. I would install a new plug if gas is getting to the engine.
If the new plug gets it going, I suggest checking the valves and adjusting if needed.
I would give it a short shot of staring fluid if the plug is wet like flooded.
 

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X2 on check the gas and petcock, check for fuel in the carb and on the plug, then install a new spark plug, check for spark.
If all that fails adjust the valves. Should get them adjusted either way.
 
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other than valve adjustment , make sure the plugs sparking and fuel is making it to carb.
bleed your carb and see if fuel flows.

you may want to pull the carb and clean it and hit the passages with air.
 
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