ADS Rhino is running rough?

[DoublePslayer]

My dad has a 660 rhino that just started running really bad. It'll idle fine, but when you put a load on the motor it will start missing, and eventually quit. It usually cranks back up pretty easily. We were thinking bad gas, but a bottle of sea foam didn't help it much. Any suggestions? I'm thinking fuel filter or pump.

[tdaggett]

Filter and pump are the place to start. I went throught 3 stock pumps and finally put an electric pump on mine. Air leaks between the carb and intake manifold are pretty common too, and a good carb cleaning probably wouldn't hurt either. I've been through my 660 motor a couple times and am pretty familiar, so if those things don't work, PM me and we can try to figure it out.

[Blazer406]

A few things:

I installed a plastic see thru barbed automotive type carb fuel filter in place of the stock filter. It is way bigger than the factory filter and will continue to flow good clean fuel much longer than the tiny stock filter.

Also, my coil wire wore out where it connects to the spark plug and would work itself off the plug and just rest on the end of the plug causing mine to run bad up in the higher RPM's and when under more load. I ended up just buying a used coil off ebay and installing it. Works fine now.

Last recommendation.... My '06 660 used to be a bear to crank if it sat for a few weeks. It would spin over forever before fuel got to the carb and then it would finally crank. I went to walmart and bought a boat gas tank priming bulb and a few feet of fuel hose at the parts house. Once installed, you can squeeze the priming bulb a couple times if the old girl has sat for a few weeks and it will fire right up. I highly recommend it. I even installed it where I could get to the bulb without removing the pass seat. No more cranking on it for 60 seconds or more trying to get it to pickup the fuel....

HTH

[Agua]

Could be a lot of things. I'd start with fuel filter, but as long as youve got the housing removed, look at the exhaust manifold collar to see if its cracked or the securing clamps aren't tight. Could need to clean / change the air filter (wouldn't hurt anything anyway). Could be trash or built up varnish in the carbuerator. Just personally, unless you're just really good with putting tiny pieces back together (like 1000 of them), I'd let a pro do anything beyond taking the bowl or the big brass jet off.

There WAS a design flaw with the fuel pumps somewhere around 2005 - 2006 on the 660, but the replacement stock pumps supposedly work fine. I've got an 06 660 and was looking at that at one time when mine would "stumble" badly at full throttle, but it ended up being varnish in the carbuerator.

Lastly, have you tried fooling with the idle screw?

[Agua]

Last recommendation.... My '06 660 used to be a bear to crank if it sat for a few weeks. It would spin over forever before fuel got to the carb and then it would finally crank. I went to walmart and bought a boat gas tank priming bulb and a few feet of fuel hose at the parts house. Once installed, you can squeeze the priming bulb a couple times if the old girl has sat for a few weeks and it will fire right up. I highly recommend it. I even installed it where I could get to the bulb without removing the pass seat. No more cranking on it for 60 seconds or more trying to get it to pickup the fuel....

HTH

I've lived with that problem for years. Don't suppose you've got a pic of the setup?

[camlock]

Two things...if fuel pump is the issue, install an electric...you'll be glad u did

If not fuel related, check see if your rev limiter is grounding out and bypass it...your reverse light on dash won't work right but it is a common issue and the design flaw is gonna make it happen again, just have to live with the dash light not coming on when in reverse. It ground under seat on top motor and is a very common problem on Rhinos. I went through same thing and almost never figured it out. Seems like fuel but that rev limiter grounding makes the act exact same way when u accelerate.

Good luck!

[camlock]

Last recommendation.... My '06 660 used to be a bear to crank if it sat for a few weeks. It would spin over forever before fuel got to the carb and then it would finally crank. I went to walmart and bought a boat gas tank priming bulb and a few feet of fuel hose at the parts house. Once installed, you can squeeze the priming bulb a couple times if the old girl has sat for a few weeks and it will fire right up. I highly recommend it. I even installed it where I could get to the bulb without removing the pass seat. No more cranking on it for 60 seconds or more trying to get it to pickup the fuel....

HTH

I've lived with that problem for years. Don't suppose you've got a pic of the setup?

Electric pump solves that...like $50 at auto parts store...don't buy expense ATV aftermarket type pump for $100, same exact pump with part company sticker on it (I learned hard way).

This is one I've used...
http://www.oreillyauto.com/site/c/detai ... &ppt=C0025

You will have to be a little creative with mounting it cause it won't mount on the brackets from stock...you can remove the stock bracket and zip tie it to frame. And make sure you wire it to key switch hot wire so it doesn't run battery down staying on when its parked.

[timberjack]

I've had fuel problems with several of my small motors lately, even though I've always run non-ethanol in them. My 07 rhino wouldnt crank or would crank for a moment but stall when you gave it a little gas. I replaced the filter, checked the pump, even drained the tank and replaced the gas- no luck. Took it to a guy and he immediately said we'd have to clean or possibly replace the carb. He ended up cleaning it and she fired right up and runs like a champ. It had sat up in the shop for a month or two without being cranked. He said that even with non-ethanol fuel you must run these small motors or the carbs will seize up.

About a week after that I needed to run my pressure washer and the same thing happened. Took the carb off and cleaned it, drained the old gas out, checked the plug, etc. Still wouldn't crank. Called my guy, he says go ahead and buy a carb- $22 online. Put the new carb on and she cranked on the first pull. I firmly believe our fuel (even non-eth) is crappy.

By the way, I like the primer bulb idea for the rhino. I thought mine was the only one that you had to turn and turn and turn......

[Blazer406]

Y'all pm me your email and I'll send pics of my primer bulb setup... Costs less than $10 for the line and primer bulb. Makes my life much easier.

Fwiw, I was going to do the electric pump to remedy this issue til I thought up the primer bulb idea.. Mine has been installed about 2 seasons now.... Never had a minutes trouble since.

[DoublePslayer]

Thanks for all the tips. Going to start with the fuel filter and go from there.