notsure

2009 Yamaha Grizzly 700 EFI died.

19 posts in this topic

I was dragging some small tree branches yesterday and my grizzley 700 (EFI) backfired and died. Until that moment, it has run perfectly since I bought it new. It restarts but doesn't want to keep running. After sitting for an hour, it started, ran for 30 seconds and then died again and was harder to restart. It has less than 200 miles, has never been in water, and has good gas in the tank. I called my dealer and his guess was the fuel pump. I don't have a service manual. Is there a fuel filter in the fuel line somewhere? Is the fuel pump in the gas tank? I will probably buy a manual; are the aftermarket ones good enough? Yamaha wants 80 bucks for theirs. Thanks in advance for any replies.

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The fuel pump is in the gas tank, it is located directly behind the filler cap under the plastic. I would test it before you replace it, your problem could just as easily be the fuel injector or the throttle position sensor, or something else. A repair manual is definately a good idea because it should have specs and info that you can use to test some of the possible problem parts and it will also have a troubleshooting guide that can help you diagnose your problem. It is hard to find aftermarket manuals for newer machines, so I think the factory manual is going to be your only option, but it is the best way to go IMO. Ebay has the factory manual for $75, but you have to pay for shipping, so you may as well get it from the dealer. What I would not get from the dealer is parts, when you get ready to order parts, check Babbits Sports Center, Service Honda, and Bike Bandit. You will save alot of money on the parts by buying them from an online retailer, and they have the same OEM parts that the dealer will have. Good luck.

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Wish I'd bought the extended warranty. My last Yamaha (350 Moto4) went 20 years with no service problems. New fuel pump is over $400.00; guess I'll give the dealer some bucks to find out what's wrong. Thanks for the replies.

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I would get a manual and try and diagnose the problem yourself before letting a dealer rape you and maybe replace a few things that don't need replacing before they get it right. Just my personal opinion, I would never, take my quad to a dealer unless I wasn't paying for it. Just too expensive. Ether way, good luck. BTW, another thing I won't let a dealer do is sell me parts. Like I said in the last post, an online parts retailer will save you money. Service Honda sells the fuel pump for $309.69 + shipping. Here is a link to the site, check them out. You can look up the part by entering the part # 3B4-13907-10-00. You can also look up the machine on the micro fische, you will need to look it up by the Yamaha model number, the bigger Grizzlys aren't listed as such, just by the model number.

Already Have A Part Number? - ServiceHonda.com

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I know. It burns me to have to take it to the dealer. I'll get a manual coming and at least give it a shot myself. Thanks for the link.

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Good luck, I hope you can get it figured out, it's a shame that you have to be doing this on such a new machine.

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So what was the outcome not sure??

I'm curious because my 09' Grizzly 700 EFI did the same thing and is having the same symptoms

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I would suggest you do the same thing that I recommended for Notsure.

I just ordered the manual and we'll see what's going on.....Thanks

I'll post an update when it's all figured out

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Update;

Did oil change/filter change (Amsoil synthetic 10/40) replaced spark plug and she is off and running better than ever.

I guess the problem was the spark plug.....I'm surprised that it went bad with only 49.5 hr.s on it.

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Just curious, what did the old plug look like? It's condition could be an indicator of another problem. I guess maybe sometimes you just get a bad one that doesn't last. Hope it stays running good for you.

Edited by DirtDemon

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It was very dark in color (on the brown side). I had bad plugs on a Evinrude 9.9 hp 4 stroke outboard that looked exactly like this plug and it acted the same way my Grizzly did.

I know when I bought the quad they told me not to let it sit and idle and not to run it at low rpm's for long periods. Well in the last couple of weeks I was doing all those things.

It has always run extremely well when I was trail riding and even some snow plowing last year but in recent weeks I was grading dirt with my plow and it really working hard.

I'm going to see how she is over the next couple of weeks just doing some trail riding with my buds.

Thanks for the replies

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my uncle runs a grizzly 700 efi. he was told the reason for not idling or low idle driving for extended periods of time was the heat off the engine causing fuel to vapourize in the lines making it run lean and then foulling the plug. he changes his plug 5 times a year.

your friendly neighbourhood mechanic

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That explains it.....the quad was running a bit hot when it died.

Sounds like very good preventative maintenance changing out the plug a few times a year

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I took it to the dealer, finally. They had it for a week. They did a lot of system checks...everything was ok. They finally added a 'carbon buster' to the gas and it started and ran. They blamed the gas. I get 500 gallons at a time and the barrel was filled the first part of May. I use unleaded, no ethanol. None of my other vehicles have had a problem with the gas, including my other Yamaha, a Moto4, chain saw, leaf blowers, mc's, etc. I guess I don't beat on the Grizz hard enough. Now when I'm riding around the farm I keep the Grizz in low.

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more than likely fuel pump. the early 700 raptors had a recall on a bunch of them for the same symptoms... the pump should have a screen on it, not much of a filter I'm afraid. Good Luck.

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check your gas cap to see if it the vent is plugged, happened to a buddies grizzly and my nephews wolverine

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