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Thread: R5 runs but stalls

  1. #1
    Join Date
    Dec 2019
    Location
    Huntsville, Texas
    Posts
    25

    Default R5 runs but stalls

    Woohoo! Got my R5 running but it stalls out after running for about 5 seconds. It runs even and smooth - just acts like it is fuel starved. Fuel line and tank is clear, fuel pump is working and fuel is getting to carb. Could this be an issue with float adjustment? If so what are specs for float levelon Zenith K5 or where can I find them? Nothing in manual on this.

    Big relief I got it starting and running. Any tips on this issue appreciated.

  2. #2
    Join Date
    Mar 2018
    Posts
    203

    Default

    I also had a problem with stalling with a Zenith K5, or having to baby it up to any speed. All kinds of suggestions but I read the manual and opened the high speed jet another 1/2 turn and now it runs OK. I am going to try it a little farther open, but it made a huge difference. Grant. Try the cheap and simple things first.

  3. #3
    Join Date
    Dec 2019
    Location
    Pouce Coupe, BC Canada
    Posts
    63

    Default no restrictions......

    make sure nothing is in the tank but fuel....i mean nothing...

    -once found a bumblebee in a gas tank...dried...hard...was plugging off tank outlet..
    Caterpillar D6C 99J

  4. #4
    Join Date
    Aug 2008
    Location
    Paso Robles, CA
    Posts
    1,012

    Default

    Neighbor had one here always afraid to use it even back in the 60's, cause it burned 5 gallons/per hour to get any work done. Takes a good sized fuel line to run that much fuel,without any blockages.

  5. #5
    Join Date
    Dec 2019
    Location
    Huntsville, Texas
    Posts
    25

    Default

    I'll check the tank and line again - that would be too easy but maybe so. And yes R5 is known for its appetite for gas.

  6. #6
    Join Date
    Dec 2019
    Location
    Pouce Coupe, BC Canada
    Posts
    63

    Default fuel filter?

    -what about fuel filter? must be something before carb?
    Caterpillar D6C 99J

  7. #7
    Join Date
    Dec 2019
    Location
    Huntsville, Texas
    Posts
    25

    Default

    Just a sediment bowl - it's clear. I pulled the fuel line from the carb and cranked the engine - the pump is pushing fuel. But if the lines or tank are restricted by debris that might be enough to retard flow to carb. I'll check it out tomorrow.

  8. #8
    Join Date
    Dec 2019
    Location
    Huntsville, Texas
    Posts
    25

    Default

    By the way can someone tell me the displacement/ci on an R5? One carb rebuilder I was talking to said it was 618 - that's big!

  9. #9
    Join Date
    Nov 2006
    Location
    California City, CA USA
    Posts
    539

    Default 413

    413 CI.

    5 1/2" X 6 1/2". per LaVoie's Pocket Guide (ACMOC BookStore).

    Daron

  10. #10
    Join Date
    Dec 2019
    Location
    Pouce Coupe, BC Canada
    Posts
    63

    Default ? ?

    Quote Originally Posted by daron View Post
    413 CI.

    5 1/2" X 6 1/2". per LaVoie's Pocket Guide (ACMOC BookStore).

    Daron
    5.5 x5.5 x.7854 x 6.5= 154.43 cubic inches per cylinder....??

    -but 4 x 154.43= 617.72
    Last edited by kittylover123; 01-13-2020 at 01:12 AM.
    Caterpillar D6C 99J

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