660 engine fan removal?? - Yamaha Rhino Forum - Rhino Forums.net
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post #1 of 16 (permalink) Old 05-30-2011, 11:46 AM Thread Starter
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660 engine fan removal??

Sorry if this is a stupid question but i am new to the whole Rhino thing. Just got myself an 07 camo 660 with too many options to list. Love the machine but noticed the first time I was in water about 3-5 inches over the floor it bogged out like it was loosing power. I thought a connection at first. So i checked it over found the plug boot was off just a bit. I figured I had the problem solved. Then went in some deep water this weekend and it boggs and sputters the same. So i started reading on snorkels and noticed something about the fan removal on the 660's? Any help is appreciated.

maybe a link to a thread for the removal and what the benefits are?

Thx alot

MB
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post #2 of 16 (permalink) Old 05-30-2011, 11:57 AM
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You just unbolt it- it's the fan that's attached to the passenger side of the engine. I took mine off to do the 686 kit, but haven't put it back on. I'm not a mudder, but I can't really see how effective this fan would be... just blowing air on the stator cover? I think I'll leave mine off... I know a lot of guys do. It's the only way you can run an alternator, so it seems common!
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post #3 of 16 (permalink) Old 05-30-2011, 12:21 PM
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ok, its the dumbest thing yami did, its a fan runs of the crank to turn a fan to blow air on the stock exhaust rubber bracket, u can see a tube ran to it,

when u go in water or mud its fighting to turn ur motor thru the mud n water,

its a for sure thing to remove, and they didnt install it any longer on the 700 models anyways

remove passenger seat, remove the black cover from side of motor and 4 bolts bolting on fan and the washer plate, remove all that crap install black cover back on and ur done,
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post #4 of 16 (permalink) Old 05-30-2011, 01:37 PM Thread Starter
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Awesome thx alot guys. I will be taking this fan out this week. I am sure that is what is happeneing when I am in water its almost like the motor is loosing power. Than once I am out it takes a couple seconds than here comes the power again.

MB
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post #5 of 16 (permalink) Old 09-23-2011, 07:41 PM
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Quote:
Originally Posted by benzo View Post
ok, its the dumbest thing yami did, its a fan runs of the crank to turn a fan to blow air on the stock exhaust rubber bracket, u can see a tube ran to it,

when u go in water or mud its fighting to turn ur motor thru the mud n water,

its a for sure thing to remove, and they didnt install it any longer on the 700 models anyways

remove passenger seat, remove the black cover from side of motor and 4 bolts bolting on fan and the washer plate, remove all that crap install black cover back on and ur done,

I have the same issue as well and was wondering why this happens... I live here in Flori duh and when in the muddy water it bogs as if it is going to conk out.... It never does but sure freaks you out thinking it might stall... I am all snorkeled out and even have the gas tank vent removed from the frame and lifted up to the level of the snorkels... Think removing this fan will help my issue?
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post #6 of 16 (permalink) Old 09-23-2011, 07:46 PM
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Quote:
Originally Posted by DaytonaRhino View Post
Quote:
Originally Posted by benzo View Post
ok, its the dumbest thing yami did, its a fan runs of the crank to turn a fan to blow air on the stock exhaust rubber bracket, u can see a tube ran to it,

when u go in water or mud its fighting to turn ur motor thru the mud n water,

its a for sure thing to remove, and they didnt install it any longer on the 700 models anyways

remove passenger seat, remove the black cover from side of motor and 4 bolts bolting on fan and the washer plate, remove all that crap install black cover back on and ur done,

I have the same issue as well and was wondering why this happens... I live here in Flori duh and when in the muddy water it bogs as if it is going to conk out.... It never does but sure freaks you out thinking it might stall... I am all snorkeled out and even have the gas tank vent removed from the frame and lifted up to the level of the snorkels... Think removing this fan will help my issue?
It for sure will. Mine has been off over a year now. No issues.

Just happy to be riding again
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post #7 of 16 (permalink) Old 10-13-2011, 05:07 PM
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had same issues with my 660. took advise from posts here and removed fan. with in 6 mnts all rubber in exhaust mounts were destroyed. dealer said it was because no exhaust fan, and i was lucky stater didnt over heat. got scared and put fan back on. wish i new for sure cause i ride in water-mud all the time and hate the bogging down.
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post #8 of 16 (permalink) Old 10-13-2011, 05:50 PM
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Well easy fix for that dump the exhaust and get your self a set of muzzys :-) problem fixed
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post #9 of 16 (permalink) Old 10-13-2011, 08:49 PM
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Hey MB,

There's a new guy scutty83 thats looking for the stock fan assembly, you may be able to sell it for a couple of bucks.

Here's his thread:
Newby Owner needs Rhino 660 parts!

Mike


Parts list available upon request...
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post #10 of 16 (permalink) Old 10-14-2011, 06:41 AM Thread Starter
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Originally Posted by azmike View Post
Hey MB,

There's a new guy scutty83 thats looking for the stock fan assembly, you may be able to sell it for a couple of bucks.

Here's his thread:
Newby Owner needs Rhino 660 parts!

Mike

Thx man but I think I will keep it just in case I ever get rid of this thing. That way I can put it back on if the next guy wants it. I havent followed this thread but I read someone was worried about the stator is that acutally a concern?? I cant see this little fan cooling much of anything except that exhaust mount?

thx MB
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post #11 of 16 (permalink) Old 10-14-2011, 07:22 AM
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are you shure its not the coil getting wet. I have a hard time believing that a 660 engine cant power a little fan in water. try spraying areas of the engine with water starting from the bottom up.
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post #12 of 16 (permalink) Old 01-13-2012, 07:25 PM
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has there even been a definitive answer to this. remove it or not?

07 Camo,Rhino
26" mud lites
100% stock
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post #13 of 16 (permalink) Old 01-14-2012, 03:23 PM
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I've done some deep water crossings and never found that that little fan robbed enough engine power to notice a difference.
You said that it sputters. That fan wouldn't cause the engine to sputter.
If it's bogging/sputtering that much, I would suspect something else is up.
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post #14 of 16 (permalink) Old 08-20-2016, 08:10 PM
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So do we delete these stupid things or not? I can't see it doing much of anything.
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post #15 of 16 (permalink) Old 08-20-2016, 09:17 PM
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Quote:
Originally Posted by honda450sfm View Post
I've done some deep water crossings and never found that that little fan robbed enough engine power to notice a difference.
You said that it sputters. That fan wouldn't cause the engine to sputter.
If it's bogging/sputtering that much, I would suspect something else is up.
Compare the weight of a cubic foot of water to a cubic foot of air. The fan is trying to push that water up through the duct and if it can actually do it, the water is going everywhere. I would imagine that the ignition coil gets a good dose of water.

As far as cooling the stator, I'm skeptical of that claim. The fan and the cover are plastic, so there is not going to be very much thermal transfer from the stator to the engine case and then on to the air spinning inside of the fan housing.

The engine was originally used in an ATV and that spot was where the pull starter was. So, the Grizzly never had the benefit of that air flow to cool the same stator arrangement. The pull starter is rather impractical inside of the confines of a Rhino, so the engineers had to think up something to do with it, eh? :-)

My 2004 has been without that fan impeller for an awfully long time and I've never missed it.

2004 Rhino 660
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