Problm with my T8

  • chappy
    Hastings, MN
    Posts: 4854
    #1262868

    Started it up tonight to make a trolling run and it started right up. Problem was as soon as I tried throttling it down to idle, She’d kill. Did it multiple times… Good thing I was in a place where there was current so I could use the 140.Anyone have any ideas? I checked the linkage it was fine.

    kerk
    Maplewood, MN
    Posts: 76
    #775803

    Too much “stuff” in the boat?

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    #775805

    Quote:


    Started it up tonight to make a trolling run and it started right up. Problem was as soon as I tried throttling it down to idle, She’d kill. Did it multiple times… Good thing I was in a place where there was current so I could use the 140.Anyone have any ideas? I checked the linkage it was fine.


    Sounds to me like a plugged low speed jet in the carb. You can try to run some seafoam, etc., through your motor to see if that clears it up. If not, take the carb off the motor, disassemble, pull the jet (there’s two the one you want is the smaller of the two), use a bristle from a wire bristle brush to GENTLY clean down the length of the jet. Reassemble. She’ll be as good as new and if you’re mechanically inclined it won’t take more than 30 – 45 minutes start to finish.

    chris-tuckner
    Hastings/Isle MN
    Posts: 12318
    #775807

    Or if you are Holst, I have seen in done in under a beer.

    nick
    Lakeville, MN
    Posts: 4977
    #775813

    Chappy, motor problems? who would’ve thought

    mark-bruzek
    Two Harbors, MN
    Posts: 3867
    #775812

    best thing to do from now on is unhook the gas after each use and run it till it stops. it will be less likely to plug as quickley.

    chris-tuckner
    Hastings/Isle MN
    Posts: 12318
    #775818

    Or just use Seafoam regularly to prevent it in the first place.

    T-8’s are great motors! The BEST in my opinion! But they are notoriously known for this affliction.

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    #775828

    Quote:


    Or if you are Holst, I have seen in done in under a beer.


    The yamaha engineers get some serious kudos for the design on the carb assembly on the T8. You can remove it with commonly available tools, clearances for big hands are not an issue and there are a minimum of parts to keep straight. Once you’ve gone through a cleaning of this type it is less of a hassle than changing lower unit lube. Not that it happens often… I would say over all the T8’s I’ve had and all the hours put on those motors I’ve only had to clean my own 2 times. And I had one T8 that had an hour meter / RPM gauge combo that totaled 1700 hours in under two seasons.

    I know I’ve done more than a few that weren’t mine though.

    This might not be a bad topic for a video for sharing here on the website.

    tom_gursky
    Michigan's Upper Peninsula(Iron Mountain)
    Posts: 4751
    #775837

    Quote:


    Or if you are Holst, I have seen in done in under a beer.



    It took my dealer hours to improperly hook up my Lowrance 332C…Holst reinstalled it in less tnan 10 min with only my Leatherman…

    lundgeye
    Rochester, Minnesota
    Posts: 1209
    #775838

    James has given you the solution…but here’s a nifty idea to remember in case you don’t have a wire brush around to steal a bristle from. The wire in a “twist tie” sandwich bag tie…is also the perfect size. I’ve used this more than once by stripping the paper off with one quick pull leaving me an end of wire and another end with the paper on to serve as a handle. As an aside, this is also the correct size for the idle jet on 6.5hp Tecumseh engines found on some lawn boy push mowers… I’ll bet ya never knew there was a valuable tool in your lunch box

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    #775841

    Quote:


    The wire in a “twist tie” sandwich bag tie…is also the perfect size.


    Ooooh, that is a good one.

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    #775843

    Quote:


    Quote:


    Or if you are Holst, I have seen in done in under a beer.




    It took my dealer hours to improperly hook up my Lowrance 332C…Holst reinstalled it in less tnan 10 min with only my Leatherman…


    They had it close. I just took it the rest of the way.

    chris-tuckner
    Hastings/Isle MN
    Posts: 12318
    #775845

    Quote:


    Quote:


    Quote:


    Or if you are Holst, I have seen in done in under a beer.



    It took my dealer hours to improperly hook up my Lowrance 332C…Holst reinstalled it in less tnan 10 min with only my Leatherman…


    They had it close. I just took it the rest of the way.


    It’s his gift…and his curse.

    chappy
    Hastings, MN
    Posts: 4854
    #775899

    Quote:


    Chappy, motor problems? who would’ve thought


    ?????

    nick
    Lakeville, MN
    Posts: 4977
    #776003

    truck, boat, snowblower(?), ( don’t remember all the details) I just remember a few threads in the past

    chappy
    Hastings, MN
    Posts: 4854
    #776518

    Quote:


    truck, boat, snowblower(?), ( don’t remember all the details) I just remember a few threads in the past


    I didn’t think people kept that close of tabs on me!

    chappy
    Hastings, MN
    Posts: 4854
    #776753

    James was right on! a couple PM’s and I get her fixed up. Is there anything James does’nt know? Do ya have a tip on how to get that back bolt on the Carb. tightened up? My lord that’s a tricky one!

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    #776759

    Quote:


    James was right on! a couple PM’s and I get her fixed up. Is there anything James does’nt know? Do ya have a tip on how to get that back bolt on the Carb. tightened up? My lord that’s a tricky one!


    Happy to hear you got it working again. Now that you know how to do it you’ll be able to do it with your eyes closed and in half the time now that you’ve been through it once.

    Now if you really want to make that little bugger sing, we should talk about drilling out the pressed in fitting covering the air adjustment screw…

    Nope, I think we’ll let that sit.

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