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  1. #11
    Elite Member BobRip's Avatar
    Join Date
    Sep 2004
    Posts
    4,329
    Location
    Powhatan Va.
    Tractor
    2000 Power Trac 422

    Default Re: Robin Subaru Engine Problems With Solutions

    Does the 9HP have a fuel pump?
    Bob Rip
    Tell me and I will hear.
    Show me and I will see.
    Let me do and I will learn.
    Let me fail and I will understand.

  2. #12
    New Member JIMMY JAMES's Avatar
    Join Date
    Sep 2009
    Posts
    16
    Location
    EASTON ,PA
    Tractor
    KUBATO B7800

    Default Re: Robin Subaru Engine Problems With Solutions

    [SIZE="6"] Bob do you have any ideas [/SIZE ]
    KUBOTA B7800 FEL WITH FORKS AND REAR PTO 5' SNOWBLOWER AND
    HARBOR FREIGHT TOW BEHIND BACKHOE

  3. #13
    Elite Member Skyco's Avatar
    Join Date
    Jul 2007
    Posts
    2,718
    Location
    SC/NC

    Default Re: Robin Subaru Engine Problems With Solutions

    Quote Originally Posted by BobRip View Post
    Does the 9HP have a fuel pump?
    The Robin 9hp on my log splitter doesn't...

  4. #14
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    717
    Location
    Port Orchard, WA
    Tractor
    Power Trac 422 (2005)

    Default Re: Robin Subaru Engine Problems With Solutions

    You can look at the ex27 manual and pictures at robinamerica.com

    Definitely no fuel pump, just gravity fed. I retract my previous vapor lock guess. Not the same problem we have with PT 422s. Close proximity of fuel tank and carburator makes vapor lock less of an issue.

    Low oil pressure shutdown sensor? Maybe that is giving you your problem?
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, box blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  5. #15
    New Member JIMMY JAMES's Avatar
    Join Date
    Sep 2009
    Posts
    16
    Location
    EASTON ,PA
    Tractor
    KUBATO B7800

    Default Re: Robin Subaru Engine Problems With Solutions

    Oil is filled to the top and wouldn't the problem happen right away? The engine runs for 1hr - 45mins before it starts acting up
    KUBOTA B7800 FEL WITH FORKS AND REAR PTO 5' SNOWBLOWER AND
    HARBOR FREIGHT TOW BEHIND BACKHOE

  6. #16
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    717
    Location
    Port Orchard, WA
    Tractor
    Power Trac 422 (2005)

    Default Re: Robin Subaru Engine Problems With Solutions

    I was thinking more that maybe the sensor was faulty. It heats up, and then triggers a shutdown. Oil sensor was optional for your engine (based upon my brief read of the manual... I am not a smallmengine expert and I did not stay at the Holiday Inn Exprsss last night).

    Look at page 55 of the service manual:

    http://robinamerica.com/media/manual...0160998465.pdf

    I am not sure how to hot wire the sensor... Either ground the wire or leave it detached and see if the engine stays running.
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, box blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  7. #17
    Elite Member Skyco's Avatar
    Join Date
    Jul 2007
    Posts
    2,718
    Location
    SC/NC

    Default Re: Robin Subaru Engine Problems With Solutions

    Quote Originally Posted by Tim_in_CT View Post
    I was thinking more that maybe the sensor was faulty. It heats up, and then triggers a shutdown. Oil sensor was optional for your engine (based upon my brief read of the manual... I am not a smallmengine expert and I did not stay at the Holiday Inn Exprsss last night).

    Look at page 55 of the service manual:

    http://robinamerica.com/media/manual...0160998465.pdf

    I am not sure how to hot wire the sensor... Either ground the wire or leave it detached and see if the engine stays running.
    Looking at the manual an open (disconnected) would fake a good oil level. However that sensor is a magnetic float triggered reed switch and I doubt it is temp sensitive, but worth a try. There is a "black box" associated with the oil sensor that could be bad...what puzzles me is the diagram shows an LED output...so what powers it? Unless it is the electric start version with a battery -If the engine isn't running it has no electric power available.
    Since the engine has a solid state igntion I'm thinking a component is temp sensitive and heating up.
    Next time it quits perhaps JimmyJohn could check and see if it still has spark.

  8. #18

    Default Re: Robin Subaru Engine Problems With Solutions

    i got the eh65 subaru Vtwin engine.
    it runs on one cylinder i switched the coils around and it still runs bad on the same cylinder.
    it keep fauling up the plug and i have the same amount of compression on both sides.
    would the Igniter be bad?
    would greatly aprecciate the help to find whats wrong with this engine.

  9. #19
    Elite Member BobRip's Avatar
    Join Date
    Sep 2004
    Posts
    4,329
    Location
    Powhatan Va.
    Tractor
    2000 Power Trac 422

    Default Re: Robin Subaru Engine Problems With Solutions

    I don't understand the term igniter. Did you swap the ignition wire with the coil? Do you have the gap set right between the coil and the rotor? Is the plug oily or black soot covered?
    Bob Rip
    Tell me and I will hear.
    Show me and I will see.
    Let me do and I will learn.
    Let me fail and I will understand.

  10. #20

    Default Re: Robin Subaru Engine Problems With Solutions

    the sparkplug doesnt really have the black soot on it so it isnt a oil burner.
    it just has to weak of a spark on the one side and the coils are good.

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