I found a clamp that pinches the throttle cable on my boat. A "google" turned up the part is available from West Marine. It prevents the throttle from sliding back to idle.
https://www.westmarine.com/buy/seastar-solutions--throttle-cable-brake-for-3300-4600-6400-series-cable--162018 Engine RPMs: My engine ran fine when I first got my boat but the Tach read low all the time. Max was 1800. I checked it using a hand held tachometer and found the boat tach was reading half the RPMs the engine was turning. Looking at the Tach instrument, I found I could rotate a knob on the back that worked as a multiplier and I got the readings to be closer to real. The engine was turning 3600 when the boat tach read 3400. I just live with the difference. I find the temperature gage is a better forecaster of performance and usually set the throttle so she stays below 195 degrees. Chuck Scheaffer Resolute 1989 C&C 34R Pasadena Md > On June 23, 2020 at 10:13 AM Bill Coleman via CnC-List > <cnc-list@cnc-list.com> wrote: > > When I installed the new Kubota on my 39 oh, I could not keep the > throttle fully extended either. The spring for the throttle was inside the > engine, so there was no changing that. So, I experimented with a number of > extension springs from the local hardware untill I found one that pulled > against it just right so that it would stay where I wanted it. > This is probably new information for Rich. > > Bill Coleman > Erie PA > > On Mon, Jun 22, 2020, 5:20 PM Chuck Gilchrest via CnC-List < > cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote: > > > > > > Back when our engine controls were installed, there was no easy way > > to induce friction to the throttle cable to keep the throttle return from > > backing the engine down. The common fix was to place a small clamp on the > > throttle cable housing and induce just enough compression on the cable to > > prevent it from backing down by itself. > > > > Mine has a factory installed clamp located adjacent to the > > starboard lazarette so it is pretty accessible if it needs adjustment. On > > newer pedestal top engine controls (Edson 816 and 870 models), there’s a > > hex bolt located inside the control housing that puts pressure on a bushing > > surrounding the throttle lever. > > > > > > > > There’s no way my diesel revs anywhere near as high as yours. If > > my engine revs over 2500, the engine feels like it is going to jump clear > > out of the hull. At 2100 RPM, Half Magic cruises well over 6knts in smooth > > water, 2500 just digs a bigger hole in the water.. Maybe I need motor > > mounts??? > > > > Chuck Gilchrest > > > > S/V Half Magic > > > > 1983 Landfall 35 > > > > Padanaram, MA > > > > >
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