My throttle control won't stay in the full open position it springs back to about ¾. With the engine off it stays full open. What's the deal?
sounds like it could be the cable,try disconnecting the cable at both ends and see if it moves freely,also mine has a friction clamp in side the engine bay see if the bolt has fell out,remove the compass to get access to the cable,hope this helps ocean pilgrim
Mine needed a friction clamp as well.
It moves freely when the engine is off. Stays in the full position. When the engine is running it only goes to 3/4 or about 2k on the tachometer.
As you advance the throttle, you are compressing a spring inside the governor. Probably what is happening is the throttle is vibrating back to 3/4. Ours does this too, but only above 2500 rpm. I seldom run it up there, so it is still low on The List. You are probably going to have to add some friction so it will stay put.
Jim, tell us about your friction clamp.
Thanks for the info. It looks like I need to find a friction clamp.
It looks like a little c-clamp, and actually clamps on the cable to cause some friction inside it. I'll have to see if I can get a picture. It was what Lakewood Yacht Service recommended after I replaced all the cables, and they slid so smooth, it kept sliding back to idle....
Leo,
Make a trip to Home Depot or Loews. In the electric depat. look for or ask a sales person (hope they are smarter than here in U.C.L.A. {Upper Corner Lower Alabama}) and find a ground wire clamp. They come in different sizes. Find one that will slide over the cable sheath. Remove the cable from the CAV pump and slide it over the sheath. In a straight section, use a socket and ratchet to tighten the bolt. This will compress the sheath around the control cable. Tighten gradually and test. Do not over tighten since the sheath is metal and once deformed it will not pop back out. You will be replacing the control cable at worse. This will solve your problem. Question, why are you running the engine at max throttle?
Nelson
This straight from the Edson website
Q4: My throttle doesn't hold when I push it full forward - what can I do?
A4: Some Engine have a very tight spring on the throttle lever. Depending on the Engine Control Model, you may be able to tighten the Throttle Friction Adjuster. Older controls may not have this adjuster, but a "horseshoe" cable-clamp can easily and inexpensively be clamped around the outer jacket of the engine control cable to add the proper cable resistance.
Just looking at this old post, the throttle works properly after the injection pump was rebuilt. Something to do with fuel leaking into parts of the pump where it should not. Mine had fuel leaking past the throttle control shaft.