Grizzly 700 Boiling Gas

**1Bad1000Xxc** · #1 (**permalink**) 04-04-2008, 12:15 AM

It seems to be that every Grizzly 700 site you go to, there's gonna be a thread posted by someone about the Grizzly 700 having a boiling gas problem. Does it boil, does it not boil, that seems to be the question. Then as soon as someone has happily purchased a new Grizlly, they run across such a thread, as did I, not knowing any better and getting concerned. I even found a youtube video at some point "documenting" a Grizzly boiling gas. We're here to clear up this mistaken phenomenon.

The Grizzly 700 does NOT boil gas. It never has, and hopefully never will. Had there ever been such a problem, Yamaha would have recalled every Grizzly 700 for fear of someone blowing their crotch off from the gas boiling. If you look in the tank while the engine is running, the pure vibration of the motor, with the tank positioned above it, makes it APPEAR as if it is boiling. However, it's not. Nothing is happening more than vibration causing a rippling effect on the fuel, giving it such an appearance. If you don't believe us, take a thermometer and see if your fuel is actually at or even near 356 degrees fahrenheit as that's the boiling temp of gasoline.

Another issue with the Grizz 700 that gives it such an appearance is due to a valve that is unable to bleed the pressure off fast enough. This will also result in strong gas fumes while or after riding, and possibly hearing the pressure valve leaking off the pressure build-up. There is a mod you can do to that valve to eliminate the inefficiency of it.

So, hopefully, this has cleared up any questions about this issues and helps you sleep better knowing that your gas is NOT boiling beneath you.

Buster

**Koko** · #2 (**permalink**) 04-04-2008, 08:01 AM

I do need to swap in a different valve to bleen off pressure, but I do know that Grizz has never boiled gas.

Horndog_0001 · #3 (**permalink**) 05-12-2008, 10:36 AM

I dont suggest opening the gas cap right away after riding, i made that mistake on a ride one day, the pressure built up in the tank and couldnt escape so when i opened it gas shot otta the tank abbout 6 ft above the fourwheeler. I brought it back to dealer and warranty covered the issue and a new vent tube was installed and havent had the problem since.

**GRIZZLYWIZARD** · #4 (**permalink**) 05-12-2008, 10:41 AM

This problem usually go away once you reach proper stoichiometry. Mine never does it any more.

Thom · #5 (**permalink**) 05-12-2008, 11:30 AM

WTF did he say? LOL

wildman · #6 (**permalink**) 08-27-2010, 02:49 PM

Quote:

Originally Posted by B-Dubya

It seems to be that every Grizzly 700 site you go to, there's gonna be a thread posted by someone about the Grizzly 700 having a boiling gas problem. Does it boil, does it not boil, that seems to be the question. Then as soon as someone has happily purchased a new Grizlly, they run across such a thread, as did I, not knowing any better and getting concerned. I even found a youtube video at some point "documenting" a Grizzly boiling gas. We're here to clear up this mistaken phenomenon.

The Grizzly 700 does NOT boil gas. It never has, and hopefully never will. Had there ever been such a problem, Yamaha would have recalled every Grizzly 700 for fear of someone blowing their crotch off from the gas boiling. If you look in the tank while the engine is running, the pure vibration of the motor, with the tank positioned above it, makes it APPEAR as if it is boiling. However, it's not. Nothing is happening more than vibration causing a rippling effect on the fuel, giving it such an appearance. If you don't believe us, take a thermometer and see if your fuel is actually at or even near 356 degrees fahrenheit as that's the boiling temp of gasoline.

Another issue with the Grizz 700 that gives it such an appearance is due to a valve that is unable to bleed the pressure off fast enough. This will also result in strong gas fumes while or after riding, and possibly hearing the pressure valve leaking off the pressure build-up. There is a mod you can do to that valve to eliminate the inefficiency of it.

So, hopefully, this has cleared up any questions about this issues and helps you sleep better knowing that your gas is NOT boiling beneath you.

Buster

Maybe someone needs to explain this NOT BOILING GAS issue to the young man in Southern Illinois that was severely burned a few weeks ago. A 16 year old was riding a 700 Grizzly. He heard the fuel tank hissing and pulled over, put the quad in neutral and before he could get off of the quad - the fuel tank exploded!!! He was severely burned from the fuel and the whole quad ignited in flames and the young man was then on fire!!!! I am assuming this is the first time someone has been seriously injured - maybe now YAMAHA will do something about this problem... He received 1st, 2nd & 3rd degree burns to his face, neck, arms, and hands and was flown from the scene to St. Louis, MO...

Too many companies don't want to issue recalls because of $$$$ - they prefer to wait until their hand is forced....

I am not trying to knock Yamaha - I own 2 Yamaha's myself - but this is ridiculous and Yamaha is NOT the first company to ignore serious issues such as this!!!

**BATTLEGUN** · #7 (**permalink**) 08-31-2010, 08:42 AM

Quote:

Originally Posted by wildman

Maybe someone needs to explain this NOT BOILING GAS issue to the young man in Southern Illinois that was severely burned a few weeks ago. A 16 year old was riding a 700 Grizzly. He heard the fuel tank hissing and pulled over, put the quad in neutral and before he could get off of the quad - the fuel tank exploded!!! He was severely burned from the fuel and the whole quad ignited in flames and the young man was then on fire!!!! I am assuming this is the first time someone has been seriously injured - maybe now YAMAHA will do something about this problem... He received 1st, 2nd & 3rd degree burns to his face, neck, arms, and hands and was flown from the scene to St. Louis, MO...

Too many companies don't want to issue recalls because of $$$$ - they prefer to wait until their hand is forced....

I am not trying to knock Yamaha - I own 2 Yamaha's myself - but this is ridiculous and Yamaha is NOT the first company to ignore serious issues such as this!!!

That is a terrible story to hear. If it is true, I certianly hope Yamaha steps up to the plate and fixes things, completely. I also hope the young man recovers 100%.