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Thread: Hard starting 660 Rhino after sitting

  1. #1
    Join Date
    Oct 2006
    Location
    Ambler, PA
    Posts
    35

    Hard starting 660 Rhino after sitting

    Hey There,
    I picked up a used 2005 660 Rhino and I love it. The only problem I have is with starting the thing after it has sit for a couple of weeks. (unfortunately I don't get to drive it as much as I'd like to ) I talked to the dealer and he said that because of where the fuel pump is located the fuel drains down the line and then it takes a lot of cranking to get the fuel back up. He suggested jumping the battery when it is started so it doesn't lessen the battery life by all the cranking, or squirting some starting fluid to get it to fire and get the gas moving. Any other suggestions?
    Thanks,
    Michael

  2. #2
    Join Date
    Mar 2004
    Location
    DE
    Posts
    2,937
    Replace your fuel filter first. If you havent done so lately this will help some. Also if you have the time, remove the fuel pickup from the tank. Sometimes youll find some plastic shaving in the tank that might block up the pickup/fuel lines. Make sure all your fuel/vaccum lines are also in god shape and attatched. Other than that the vaccum fuel pump design sucks when letting it sit for some time. It takes some extra cranking to get it going.

    I installed an electric fuel pump on my rhino and love it. The engine fires up as soon as you hit the key hot or cold or even if its sat for weeks. Its no that hard to switch it over to an electric pump setup either, let me know if your interested and need any help.

    Thank you
    Justin

  3. #3
    Join Date
    Jul 2008
    Location
    Denver, Co
    Posts
    680
    Try pumping the gas 7-10 times then pull the choke and try.
    2007 TRX450ER Black w/ red frame

    Pro taper bars and grips
    Blingstar "DC" Bumper
    AC Racing Nerf Bars
    2 Brothers M-7 Exhaust
    CV4 radiator lines
    Rock Skid Plates
    ITP GP rims
    Maxxis Razr2

  4. #4
    Join Date
    Oct 2006
    Location
    Ambler, PA
    Posts
    35
    Justin,
    Thanks so much for the idea about the electric fuel pump, it makes a lot of sense. I would like to give it a try. I'll try the other suggestions this weekend. If you could let me know what kind of machine you got the fuel pump from and any other tips on installing it, that would be GREAT!
    Thanks Again,
    Michael

  5. #5
    Join Date
    Oct 2006
    Location
    Ambler, PA
    Posts
    35
    After some research, I found that Black Rhino Performance sells an electric fuel pump kit that mounts near the gas tank and I guess still utilizes the factory pump as well. I also found several people selling the Mikuni high flow vacuum pump that replaces the stock pump. If anyone has expericene with either of these I'd appreciate some feedback. My Rhino is bone stock and I intend on keeping it that way, and not sure if the high flow will bring up the gas quicker after it has been sitting.
    Thanks Again,
    Michael

  6. #6
    Join Date
    Aug 2004
    Location
    St. Blows, Missouri.
    Posts
    19
    The vacuum pump only flows fuel when the engine is turning so after sitting a few weeks your situation is 100% normal. The easiest way to start it is apply the choke and crank the engine for 10 seconds and pause 10 seconds then repeat until it starts. DO NOT USE THE THROTTLE PEDAL! It reduces the vacuum which reduces the fuel supply.
    Also a fresh NGK Iridium spark plug helps with quick starting.

    Electric fuel pumps are a huge mistake for many reasons..
    Built 06 Rhino 660 SE.

  7. #7
    Join Date
    Jul 2008
    Location
    Denver, Co
    Posts
    680
    Originally posted by Pro Wrench
    The vacuum pump only flows fuel when the engine is turning so after sitting a few weeks your situation is 100% normal. The easiest way to start it is apply the choke and crank the engine for 10 seconds and pause 10 seconds then repeat until it starts. DO NOT USE THE THROTTLE PEDAL! It reduces the vacuum which reduces the fuel supply.
    Also a fresh NGK Iridium spark plug helps with quick starting.

    Electric fuel pumps are a huge mistake for many reasons..
    Let's see what was wrong with your statement. Hold the key for 10 second intervals? Are you trying to drain your battery or fry your starter?

    Why wouldn't you use the gas pedal? I do that EVERYTIME with the 660. Pump the gas a few times, pull the choke and then start it. I have never used your veryy foolish method.
    2007 TRX450ER Black w/ red frame

    Pro taper bars and grips
    Blingstar "DC" Bumper
    AC Racing Nerf Bars
    2 Brothers M-7 Exhaust
    CV4 radiator lines
    Rock Skid Plates
    ITP GP rims
    Maxxis Razr2

  8. #8
    Join Date
    Aug 2004
    Location
    St. Blows, Missouri.
    Posts
    19

    Lightbulb

    Originally posted by stoopidbot
    Let's see what was wrong with your statement. Hold the key for 10 second intervals? Are you trying to drain your battery or fry your starter?

    Why wouldn't you use the gas pedal? I do that EVERYTIME with the 660. Pump the gas a few times, pull the choke and then start it. I have never used your veryy foolish method.
    What you do with your machine is your business, since you have never used my "foolish method" I doubt you have ever opened the owners manual either.
    If your starter motor and battery can't turn the engine over for 10 seconds I recommend you have it inspected by a qualified mechanic because you have some problems.
    The reason you don't pump the throttle? 2 reasons. First, He stated it has been sitting for a few weeks each time, so the fuel pick-up line, fuel filter, fuel pump and carburetor are not primed with fuel. The fuel pump on the 660's is vacuum operated, so it only pumps fuel to the carburetor while the engine is turning over. Opening the throttle while cranking the engine reduces the vacuum which reduces the pumps efficiency and simply requires more engine cranking to fill the fuel pick-up, fuel filter, float bowl. choke circuit inside the carburetor etc. before a single atom reaches the combustion chamber to be fired by the spark plug...
    Second "pumping" the throttle is simply not necessary on anything built withing the last few decades unless it is in a very poor state of tune.

    Happy trails..
    Built 06 Rhino 660 SE.

  9. #9
    Join Date
    Jul 2008
    Location
    Denver, Co
    Posts
    680
    Originally posted by Pro Wrench
    What you do with your machine is your business, since you have never used my "foolish method" I doubt you have ever opened the owners manual either.
    If your starter motor and battery can't turn the engine over for 10 seconds I recommend you have it inspected by a qualified mechanic because you have some problems.
    The reason you don't pump the throttle? 2 reasons. First, He stated it has been sitting for a few weeks each time, so the fuel pick-up line, fuel filter, fuel pump and carburetor are not primed with fuel. The fuel pump on the 660's is vacuum operated, so it only pumps fuel to the carburetor while the engine is turning over. Opening the throttle while cranking the engine reduces the vacuum which reduces the pumps efficiency and simply requires more engine cranking to fill the fuel pick-up, fuel filter, float bowl. choke circuit inside the carburetor etc. before a single atom reaches the combustion chamber to be fired by the spark plug...
    Second "pumping" the throttle is simply not necessary on anything built withing the last few decades unless it is in a very poor state of tune.

    Happy trails..
    We got lines crossed or something. I never said pump the gas while cranking the motor. And would you hold the starter cranking on your car for 10 seconds straight?

    Everytime I ever had problems starting my 660 it was due to extreme cold or had been sitting for a while. I would pump the gas a good 10 times. Pull the choke and turn the key. I have never had to crank the starter for 10 second intervals.
    2007 TRX450ER Black w/ red frame

    Pro taper bars and grips
    Blingstar "DC" Bumper
    AC Racing Nerf Bars
    2 Brothers M-7 Exhaust
    CV4 radiator lines
    Rock Skid Plates
    ITP GP rims
    Maxxis Razr2

  10. #10
    Join Date
    Mar 2004
    Location
    DE
    Posts
    2,937
    pro wrench, please explain why an electric fuel pump is a huge mistake. im very curious on this one.

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