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Hard starting Rhino 660

This is a discussion on Hard starting Rhino 660 within the General Rhino Discussion forums, part of the General Rhino category; When my 2007 660 had been idle for a couple of weeks (plz, no comments about me not using it enough) the fuel will have ...


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Old 08-30-2009, 06:22 AM
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Hard starting Rhino 660

When my 2007 660 had been idle for a couple of weeks (plz, no comments about me not using it enough) the fuel will have drained back to the tank. Starting it becomes a major problem most easily solved by pulling the shroud and manually (suck & blow) forcing fuel into the line by pulling the vacuum line,etc. There are no apparent leaks, cracks etc in the vacuum line and suction can be felt at the carb base when cranking. I had it to the dealer but they didn't keep it long enough for the fuel to drain back so didn't see a problem. There is no reasonable way to keep it started on a regular basis and so it has to sit for long periods. It seems to me that it ought to self prime even after sitting w/o having to go through what I've been doing. Dealer says the fuel pump is OK but I have doubts. Anyone else see this problem? What to do? New fuel pump?
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Old 08-30-2009, 06:26 AM
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Do a search on fuel pumps. You find alot of helpful info. I have had the same problem after installing a new oem pump. Today I will be installing my new pump and fuel lines from Weller racing. No more problems!
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Old 08-30-2009, 07:02 AM
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Yep, If I dont start it for a couple weeks I will have to crank about a minute for the gas to get there. I usually try to take it for a warm up ride if I have not ridin it for a couple weeks. Good news is after 2 years my battery still cranks like new.
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Old 08-30-2009, 07:25 AM
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Common problem on 07's and earlier. After sitting for a while just remove passinger seat and pull the line off of the little black rollover valve mounted next to the fuel pump and blow into it while cranking. it will put pressure into the tank and push fuel into the pump and to the carb.
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Old 08-30-2009, 07:51 AM
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I would recommend to make a better restriction in the return line to the tank. I bought a new gas line that's longer and made a loop so gravity doesn't drain your fuel line. Some people also force a main jet into the line to restrict it further.
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Old 08-30-2009, 03:00 PM
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i noticed the same thing on my 07 rhino this past weekend since it has been sitting for 3 weeks for sure cant remember
So what would be the best way to fix the problem.....
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Old 08-30-2009, 03:40 PM
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I have an 07 and I noticed as time went on my rhino became harder to start after it sat. Then one day out on a ride it just quit running. Got it going again by blowing in the return line to pressurize the tank and force gas up the fuel line. After a bunch of research I found out it was the fuel pump.

After some time the diaphram in the fuel pump dries out and becomes stiff and doesn't perform like it should. Yamaha has since changed the part number to a new pump that is supposed to be a better compound?? I changed to the Weller Racing high flow set up with the new lines and no more issues with it starting. I kept the brand new Yamaha pump they gave me and now keep it on the rhino for a back up for me or someone I may be riding with. I am now back turning it over once and having it start, not the 5-10 min. job of getting it going.

This may not be what's wrong with yours but I would start with the fuel pump before it leaves you stranded somewhere?
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Old 09-03-2009, 05:57 PM
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Quote: Originally Posted by Thehutt View Post
Common problem on 07's and earlier. After sitting for a while just remove passinger seat and pull the line off of the little black rollover valve mounted next to the fuel pump and blow into it while cranking. it will put pressure into the tank and push fuel into the pump and to the carb.
Do you have a picture of the rollover valve and where to blow air into? Mine is sitting in the garage as I type and won't start.
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Old 09-03-2009, 08:54 PM
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Quote: Originally Posted by white oak View Post
Quote: Originally Posted by Thehutt View Post
Common problem on 07's and earlier. After sitting for a while just remove passinger seat and pull the line off of the little black rollover valve mounted next to the fuel pump and blow into it while cranking. it will put pressure into the tank and push fuel into the pump and to the carb.
Do you have a picture of the rollover valve and where to blow air into? Mine is sitting in the garage as I type and won't start.
Folllow the vent line from the tank to the top of the rollover valve. The valve is directional, it has an arrow and says up.The bottom line goes into the rollcage.
I just fixed mine with the pump and line kit from Weller Racing. 10 seconds of cranking and the dry pump and lines were full.
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Old 09-05-2009, 12:01 PM
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Wow...had the same problem...just blew in the line and it cranked in 1 second! Go rhinoforums.net!!
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Old 09-05-2009, 05:32 PM
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I had the same issues, after sitting 3-4 weeks no start. I installed a primer bulb (like outboard boat motors use) in the fuel line between the tank & pump. Accouple squeezes & the rhino startes perfect without using the choke.
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Old 09-05-2009, 05:57 PM
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I'm having the same problem also.Sounds like the weller pump and lines are the way to go. Does anybody know if weller is going to be at the san sport show this month?
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Old 09-07-2009, 07:47 PM
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Quote: Originally Posted by OEM Rhino View Post
I had the same issues, after sitting 3-4 weeks no start. I installed a primer bulb (like outboard boat motors use) in the fuel line between the tank & pump. Accouple squeezes & the rhino startes perfect without using the choke.
That's frickin' ingenious.

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Old 09-07-2009, 07:59 PM
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Quote: Originally Posted by dogcatcher View Post
I'm having the same problem also.Sounds like the weller pump and lines are the way to go. Does anybody know if weller is going to be at the san sport show this month?
Im not sure if they will be at the show. They give a forum discount. I ordered mine and received it UPS the next day.
I did run a half a tank through it today. No problems! Just touch the key and it started every time. No more cranking. It actually helped the low/midrange acceleration. Sounds crazy, but it did.
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Old 07-29-2010, 07:45 AM
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Quote: Originally Posted by OEM Rhino View Post
I had the same issues, after sitting 3-4 weeks no start. I installed a primer bulb (like outboard boat motors use) in the fuel line between the tank & pump. Accouple squeezes & the rhino startes perfect without using the choke.
I bought a primer bulb and some clamps but I was wondering where is the best place to put the bulb? And did you use some extra gas line too?

I was thinking of running a longer line from the tank to behind the passenger seat and put the bulb there. That way I could reach behind the seat and pump the bulb without having to remove the seat. What do you think?

Thanx!
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