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Bobcat 610 fuel question

L

Landlocked27

New User
The Bobcat has the same problems as the rest when it gets hot it sometimes sputters. I can deal with that. But now the issue is when I shut it off after cleaning out some pens there was gas dripping pretty heavily from somewhere around the carb onto the top of the engine. I loosened the cap and the tank was pressurized. Once the pressure was released the dripping stopped. Is the tank supposed to be pressurized? Or is there a vent somewhere I am missing?
 
I was told by an old bobcat mechanic not to use ethanol it vaporizes easier than straight regular. When I switched I had alot less problem with it sputtering when warm. Also there is a carb float adjustment that helps. You will set the float down to lessen the amount of gas in the bowl. If you have a service manual it's in 1 of the appendices. I sold my 610 a few years ago and the service manual when with it.
 
should be vented. drill a 1/32 hole on the cap and try it. or find another old cap and vent it .
 
There is a sticker by the cap that says something like "may be under pressure". I wasn't sure if the tank pressurized to force fuel to the pump or not.

Does anyone know where I could get a manual?

Of course we are a small family farm, so cheap or free preferred.
 
The vent needs to be open when running.

About the only reason to close the vent would be to keep water out if stored outside or when pressure washing it.

With the vent closed, it can pressurize, which is what it is doing and overriding the needle valve, causing it to flood.

Or it can draw a vacuum, starving the carb, which is probably why it is sputtering.

Does it have a fuel pump? If so, it may be weak or failing.
 
(quoted from post at 12:43:28 09/16/19) The vent needs to be open when running.

About the only reason to close the vent would be to keep water out if stored outside or when pressure washing it.

With the vent closed, it can pressurize, which is what it is doing and overriding the needle valve, causing it to flood.

Or it can draw a vacuum, starving the carb, which is probably why it is sputtering.

Does it have a fuel pump? If so, it may be weak or failing.
Click to expand...

I dont think there is a closable vent on these units that I have seen. Maybe I am wrong.
My father in law just passed and it was his machine. I have run it the most in the last couple of years, but I am just getting into the maintenance on everything.
These units are known for sputtering or stalling out completely when they get too hot. It boils off the gas. I'm planning on insulating the lines. It doesn't sputter at all on cool days or for the first hour or so of operation. Good ol air cooled engines.
 
years ago some ford cars would get vapor locked because the fuel line would get hot. we use to take tin foil and wrap them. it would clear that problem up. your tank should have a vented gas cap to keep it from pressurizing when your motor gets hot. get your wifes aluminum foil and ty it first. locate the points where the gas line is closest to the hot spot of your motor. wont cost much to try it. might work. probably should replace the gas cap. doesn't sound as though it is venting properly. don't want you to have a fire for sure. good luck
 
I don't know about the carb leaking or the pressurizing fuel tank. But "The Bobcat has the same problems as the rest when it gets hot it sometimes sputters." problem was solved for me when my skid loader guy put an electric fuel pump in it. Good Luck!
 
Yea I would rather not be on fire. There IS about a 1/16" firewall that goes 3/4 of the way up the seat. I dont think that is much protection lol. Makes me a little nervous to run it until I figure it out.
 
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