a Yanmar YSB12 transmission control question
 

I believe the center thing may be the clutch. More modern Yanmar
engines have two such cables, one is throttle and the other is the
clutch. The clutch is engaged/disengaged by pulling it out or pushing
in on a axle-like thing below the throttle. Perhaps this works the
same. Maybe it is a push pull thing instead of being a turning lever.
I vaguely remember something like that in the Yanmar service manual.

On Sun, 05 Jun 2005 21:51:02 -0700, 5200 wrote:

Has anyone ever seen the an engine control set like this? It has one
lever in the cockpit but with something like a center ring with a
short axle stubb sticking out as if it might have also had a second
lever next to it at one time.
Waaaay back in the darkened reaches of the bilge/engine/transmission,
ridiculously tiny crawlspace area where I almost got stuck and had to
cry out in a small shrill voice for help,.. you can see there are two
rusty cables coming off the business end of the lever control(s)
assembly. One goes to the throttle and one goes to the transmission.
Am I missing a second lever in the cockpit or does one lever run both
cables? Hope some of this makes sense. Thanks again and smooth sailing
to those of you in a position to sail.

You are showing off your ignorance - but that's OK!
on outboards and boat power controllers in general, one lever moving
forward engages forward via a cable then increases throttle via a
second cable.
Moved to the rear, this lever moves a cable to engage reverse, and
then increases throttle with more movement to the rear.

Brian Whatcott Altus OK

For what it's worth (since the controls may be completely different) I
have a boat with a YSE8 (Same vintage ans the YSB12) and I have a dual
lever control. The inner lever controls the transmission while the
outer control does the throttle.

Perhaps a picture postes elsewhere and a link here might help.

Matt

5200 wrote:
Has anyone ever seen the an engine control set like this? It has one
lever in the cockpit but with something like a center ring with a
short axle stubb sticking out as if it might have also had a second
lever next to it at one time.
Waaaay back in the darkened reaches of the bilge/engine/transmission,
ridiculously tiny crawlspace area where I almost got stuck and had to
cry out in a small shrill voice for help,.. you can see there are two
rusty cables coming off the business end of the lever control(s)
assembly. One goes to the throttle and one goes to the transmission.
Am I missing a second lever in the cockpit or does one lever run both
cables? Hope some of this makes sense. Thanks again and smooth sailing
to those of you in a position to sail.

On Sun, 05 Jun 2005 21:51:02 -0700, 5200 wrote:

Has anyone ever seen the an engine control set like this? It has one
lever in the cockpit but with something like a center ring with a
short axle stubb sticking out as if it might have also had a second
lever next to it at one time.

sort of sounds like it should be a two-lever system, but it's hard to
say without seeing pictures.

I had a Yanmar 2GM with a single lever control - moving the lever
forward engages forward gear, then advances the throttle (not quite
correct terminology for e diesel, but...). Moving the lever back
engages reverse, then advances the throttle.

There were two cables from the control lever - one to the injection
pump (speed control), and the other to the transmission.

You can easily determine if it is a single or dual lever system, by
moving the existing lever - if it is a single lever control, there
should be a detent at the neutral position, and you (or an observer)
should see both the speed and shift cables move as you move the lever
through neutral. If it is a dual lever system with one lever missing,
only one cable will move, and you won't find the neutral detent if you
just have the throttle. If you just have a shift lever, it should
have three distinct positions, and no variable throttle feel.


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
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