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Post by so40gtb on Jul 7, 2015 3:26:07 GMT
On our Yanmar 4JH3E, above 1500 rpm generally and above 2100 rpm in particular, the throttle will not hold its position and slowly drops, apparently by engine and boat vibration. I looked for a brake assembly and didn't find one. There has to be a better way to fix this than stuffing a sponge between the control arm and the cockpit side!
--Karl
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Post by lateron on Jul 8, 2015 14:42:32 GMT
Hi.............. I have had the same problem on my SO32 and it was improved by adjusting/tightening the morse throttle controls but is now slipping again so will have to have another look.
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Post by sleighride on Jul 19, 2015 6:18:14 GMT
I have a DS 43 with a 4JH3-TE that had a sudden failure in Glacier Bay Alaska last June which forced me to jury rig a small wooden dowel to move the throttle from idle speed to normal cruising speed while underway until I could replace the Morse cable which had broken at the cockpit end inside the throttle pedestal. There is some adjustment at the throttle itself on the port side of the engine near the hand fuel pump. Tough to remove the engine cover while under way to control the throttle in this manner, especially when coming into s dock with only two people on board.
In in any event. If you do need to replace the "Morse " cable audit has been called historically, the new manufacturer to Teleflex, but the Junneau codes on the cable do not transfer from metric into feet as I learned the hard way. After removing the broken cable, the replacement I ordered was two feet shorter than the original. I then layer the old cable on the dock and it measured at twenty-one feet. I had not wanted to pull the broken cable before I had a new one to run through the engine and into the aft section of the boat beneath the master berth and batteries, and then up into the throttle pedestal in the cockpit.
I I should have run a separate messenger line in lieu of ordering the new cable without pulling out the old one to measure it first. However, there is always the risk that a message line might hang up on zip ties, corners, and bulkheads, while the stiffer, smoother cable will not. In any event good luck with the throttle problem!
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Post by so40gtb on Jan 23, 2016 4:25:45 GMT
Toss the sponge! The cheap keychain float that all of the dealers pass out at boat shows and open houses works far better! And it doesn't need to be dampened before use!
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Post by Quiddle on Jan 13, 2017 15:37:21 GMT
Found this thread after experiencing similar problems. One option others have used is to place a cable clamp on the cable outer and obtain desired amount of friction by tightening using trial and error. Going to give it a go.
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Post by vsergio on Jan 13, 2017 17:55:54 GMT
Karl,
On our 2003 SO35 we had the same problem since we got the boat from Toronto (high humidity and very cold in the winter).
Open the Morse Steering box first. If it came original with the boat, regardless where you live, expect significant corrosion inside. On our boat the Teleflex cables were rusted and the pewter de-metalized. The clips that holds the cables in place "dissolved" almost completely.
You may be able to salvage the controls but you need to replace the clips which are available at your local marine store ($1-2). If the cable ends after cleaning them with a rag are nothing like stainless look (ie green, or red in colour), you will need to replace the Teleflex cables as well. Do not use acids to clean the cables or any part of the mechanism of the Morse type box inside. It will ruin it.
I replaced the Teleflex cables with the Volvo made version , a bit more expensive but much better quality and also replaced the Morse box. It was a day's work by myself, easy no problems.
Older person at my marina had the same Morse box malfunction due to corrosion and crashed in to the dock trying to park. Insurance investigator concluded lack of basic maintenance and recommended no coverage.
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