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1974 merc40 throttle gears

W

waterbird

New member
"I'm working on a 74'

"I'm working on a 74' 4hp merc40 ser # 3936540
The problen lies in the tiller throttle set-up at
the engine side,the tiller throttle will rotate
360 degrees and I am trying to figure out which part may be the culprit,the gears mesh fine,I
removed the assembly and the shaft seems ok,the
gears will start to rotate the throttle then the
tiller will just keep rotating..I have a parts list and diagram from sierra marine who has all
the parts still available,but they all seem fine?
the tiller end gears are not slipping,only the engine side,I did notice that someone had packed
massive amounts of grease around the gears in question,should the gears have grease or be clean?
thank's in advance for all the help...Don"
 
"well I think I figured it out

"well I think I figured it out! It seem the gear
on the lower part,the horizontal one,has a square
drive like a 1/4 in drive ratchet that the metal
shaft slides into,the gear itself is a hard plastic and if I hold the gear by hand the shaft will slip inside the gear as it appears worn,the part is available at crowleys marine,and cheap,so
it must be a commonly replaced item on these?
hope it does it!"
 
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