660 carb leaks from a port on the bottom - Yamaha Rhino Forum - Rhino Forums.net
General Rhino Discussion For General Rhino Discussion

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 04-01-2012, 09:22 AM Thread Starter
Oil Spot
 
Join Date: Sep 2009
Posts: 20
660 carb leaks from a port on the bottom

of my carb. It sends it through a tube and basically dumps the fuel on the ground.

Anyone know why it's leaking fuel from this port? Also, is this tube supposed to be hooked up to something and possibly came loose?

As always, thanks in advance!
auTTiMan is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 04-01-2012, 09:53 AM
Boss
 
Join Date: Jan 2007
Posts: 3,612
Quote:
Originally Posted by auTTiMan View Post
of my carb. It sends it through a tube and basically dumps the fuel on the ground.

Anyone know why it's leaking fuel from this port? Also, is this tube supposed to be hooked up to something and possibly came loose?

As always, thanks in advance!
You could have a sticking float or leaky float valve. The purpose of the float and its valve is to maintain a constant level of fuel in the float bowl. If it fails, the fuel level will rise and run out of the overflow drain hose.

Rutting Rhino's fuel line system provides a clear drain hose which can easily be used to determine the fuel level.

Another culprit could be that the drain valve is not tightly closed. There is a small screw on the side of the float bowl, with the purpose of draining the float bowl. You would normally use this valve to drain water or contaminated fuel out of the float bowl. It is also used in conjunction with RR's clear hose to monitor the fuel level, with the engine running to fill the bowl. Turn this screw clockwise to shut if off.

2004 Rhino 660
SteveS is offline  
post #3 of 5 (permalink) Old 04-01-2012, 10:02 AM
Hog Chaser
 
dezert_boy's Avatar
 
Join Date: Mar 2012
Location: AZ now
Posts: 60
if it leaking from where u say it is u need to clean ur carb. something is in the float bowl that is no allowing ur float needle valve to stop the fuel delivery in the bowl which in turn will come out of ur overflow port which is on the bottom of the bowl

FPS Sheave, 16g weights, EPI Gold Spring, Stage 3 HC, BRP Air Intake w/K&N, R.I. HID Hi/Lo Kit, 2 4" HIDs, 26" Pro Comps, 14" ITP C-Series Beadlocks, 2" Spacers, TMW Offroad 4xRadius Cage, PRP 42" Bench Seat, Pro Armor Harnesses, Modified Pro Armor Baja Front Bumper
dezert_boy is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 04-01-2012, 10:29 AM
Boss
 
RuttingRhino's Avatar
 
Join Date: Jan 2011
Location: Tempe, AZ
Posts: 3,239
Quote:
Originally Posted by auTTiMan View Post
of my carb. It sends it through a tube and basically dumps the fuel on the ground.

Anyone know why it's leaking fuel from this port? Also, is this tube supposed to be hooked up to something and possibly came loose?

As always, thanks in advance!
Both of the above posts are true... the port on the bottom is the drain... the screw closes the drain... the drain has a stem in it that is open all the time and whenever the fuel level gets too high inside the carb it pours into that stem (overflow tube) and out the drain...

If the screw is loose fuel will pour out the drain...

If there is debri holding the float open fuel will pour into the over flow tube and thus out the drain...

The factory has a fuel line connected to the drain on the bottom of the carb such that over flow or when the screw is opened the fuel drains out the line around the motor to the ground and not just pour out on the motor...

Generally the stock carb in good condition should hold approximately 4-5 psi of fuel pressure back when carb is 100% full of gas...if it is out of adjustment or there is a malfunction lower pressure levels can cause the overflow to occur...one possible malfunction other than debri preventing the valve from closing is a leaking float...it relies on air to make it rise and shut off the valve...if the plastic cracks or for any reason is no longer airtight it will not rise up and shut off like it should...

Normally the stock fuel pump cannot produce enough pressure even with a closed return line to force fuel into the carb when full and thus out the over flow tube...

Some electric pumps and certainly the Mikuni 65L fuel pump we sell will produce that much fuel pressure to force open the carb if the return line is closed...

Also I have come across a whole lot of people who bought used rhinos that had "alterations" to the fuel system and did not know what they had was not factory original stuff...

So if the screw is tight... you have the factory original fuel pump... the return line is not clogged... you probably have debri in your carb...

If you bought your rhino used and not sure if what you have is factory original let me know by sending me a private message with your email address and I will get you squared away...

We are closed...2013
RuttingRhino is offline  
post #5 of 5 (permalink) Old 04-02-2012, 07:41 AM Thread Starter
Oil Spot
 
Join Date: Sep 2009
Posts: 20
Thank you all for your informative responses. I may need to remove my carb and clean it.

I bought it new in 2005 and have never done anything to it other than changing fluids and replacing a broken rear axle, so it's more than likely needing the carb cleaned - especially considering ethanol and it's effects.

Is there a link anyone can offer on a "how to" for carburetor removal and cleaning?

TIA
auTTiMan is offline  
Reply

  Lower Navigation
Go Back   Yamaha Rhino Forum - Rhino Forums.net > General Rhino > General Rhino Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Yamaha Rhino Forum - Rhino Forums.net forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome