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Author Topic: Adjusting throttle cable  (Read 449 times)

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John Langford

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Adjusting throttle cable
« on: October 09, 2018, 08:00:14 PM »

I used to be able to reach 2900 rpm, but recently the throttle control on my 1999 Mk II M35B is hitting the binnacle stainless steel support tube at about 2500rpm. It feels like there is slack in the cable as I push it forward.  The cable is as tight as it can get at the engine end. Before opening up the binnacle, I would like to know if it is possible to adjust the throttle cable tension at that end. Does anyone knowing that is the case and, if so, how the adjustment is made?
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KWKloeber

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Re: Adjusting throttle cable
« Reply #1 on: October 09, 2018, 08:29:38 PM »

Adjust it at the engine end. A customer had to fabricate a new bracket (extension) so he could relocate the cable clamp on the transmission shift cable - might need to do the same on the speed cable.
Or you may need to replace it.
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scgunner

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Re: Adjusting throttle cable
« Reply #2 on: October 10, 2018, 09:35:40 AM »

    John,

       Why not advance the throttle control full forward then on the motor side of the cable disconnect it from the throttle lever, if you can still advance the throttle lever it indicates the cable is in need of adjustment.
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Kevin Quistberg                                                 Top Gun 1987 Mk 1 Hull #273

John Langford

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Re: Adjusting throttle cable
« Reply #3 on: October 10, 2018, 11:28:18 AM »

Thanks both. I have adjusted the threaded fitting at the engine end until it was impossible to shorten the cable any further. When I hit the helm throttle control hits the binnacle tube, the throttle can still be advanced further. If no further adjustment is possible at the helm, it might be possible to move the cable clamp aft by drilling new holes in the plate on the engine to which the cable clamp is fastened. I am assuming that aft is the direction I need to go to allow the Morris control to access the extra throttle ‘room’.
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John
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KWKloeber

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Re: Adjusting throttle cable
« Reply #4 on: October 10, 2018, 11:56:22 AM »


A customer had to fabricate a new bracket (extension) so he could relocate the cable clamp on the transmission shift cable - might need to do the same on the speed cable.


I don’t have a pic but he made it out of alum angle so it had enuf stiffness.  Even drilling a new hole on the exist bracket didn’t provide the correct position. 
Or a new cable isn’t a bank breaker.
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
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John Langford

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Re: Adjusting throttle cable
« Reply #5 on: October 15, 2018, 10:28:32 PM »

Fixed the problem by disconnecting the throttle lever from the forked fitting at the binnacle end of the throttle cable, unscrewing the forked fitting from the end of the cable, drilling two holes about 1/2” further down the fork for the clevis pin and reattaching the fitting to the throttle lever on the binnacle. This had the effective of shortening the cable and thus allowing the throttle control  to provide the full power of the engine if required. More details available if anyone is interested. Thanks to all for suggestions.

Now back to the problem of my tempermental alarm switch...
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