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  1. #1

    Default Tohatsu Remote Control Throttle design/ adjustment/ wear/ maintenance ?

    I have a 1991 M30A3 with remote throttle and the remote control lever will take and hold a full throttle
    condition until the boat speeds up and gets on plane and then when I throttle back to something like
    4800 or 5000 rpms for permanent cruising the rpms will bleed off slowly over the next minute down
    to a speed that is below min planing speed. So what I have to do is constantly manipulate the
    throttle just like the accelerator in a car floorboard to maintain a sub redline cruise speed.

    I have not seen any literature about the design or construction or maintenance of the Tohatsu
    remote control throttle and transmission unit but it seems like there ought to be a way to
    tighten it up to hold rpms at whatever I set the lever to.

    Is this possible and is there any detail descriptive workshop or repair manuals for these units ?

    What is he best course of action here.

    Thanks
    Scott in Atlanta

  2. #2
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,080

    Default Re: Tohatsu Remote Control Throttle design/ adjustment/ wear/ maintenance ?

    Depending on the actual part number (or at least model) of the RC box, there is a throttle friction screw to do just that. If the motor was tiller-converted, and the tiller handle is still attached, you can also adjust the friction on the tiller handle.
    Paul
    Buffalo NY USA

  3. #3

    Default Re: Tohatsu Remote Control Throttle design/ adjustment/ wear/ maintenance ?

    here are photos of my control box. I called Tohatsu.com and spoke to a tech and he said that
    a knob protuded out of the front of the box that could be turned for friction adjustment. My control
    box does NOT have a knob but there is a plastic plug that does not look like it was intended
    to be removed from the outside. I would have to drill a hole in it and insert a screw to grab it
    to pull out. I wonder maybe if I should take the covers off the control box by removing several
    phillips head screws instead of drilling a hole and screwing in a screw in the plastic plug?

    I can understand an entire marketing and distribution network being dismantled and losing
    a lot of documentation ( if something like that happened in the USA) but there is no way
    the guys in Japan could lose the manuals and drawings from the older products. Does anyone
    speak Japanese ?
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  4. #4
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,080

    Default Re: Tohatsu Remote Control Throttle design/ adjustment/ wear/ maintenance ?

    Your control is not equipped with the throttle friction screw. You should be able to add it. You will need items 40, 41, and 42 from the picture:

    Click image for larger version. 

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    Paul
    Buffalo NY USA

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