Yanmar SB 12 Clutch 1978 Hunter 30

Oct 1, 2016
4
Cherubini Hunter 30 Elizabeth City NC
Yanmar SB 12 1978 Hunter 30
Need diagram of inside gearbox. Shifter arm engages forward gear just past neutral but disengages when shifter arm is all the way forward. When arm is all the way forward very slow rotation of propeller shaft. When arm is held in position just past netural very fast rotation of propeller shaft. What Is problem and solution? Thank you, Rich
 
May 29, 2018
457
Canel 25 foot Shiogama, japan
Rico
I would disconnect the gear change cable from the arm on the gearbox and test just by pushing the arm..
You will then eliminate the selector lever and the cable from your list of causes.
Here is the parts list. It is helpful to see how everything fits together in an exploded view.
http://lsm-diesel.dk/2012/yanmar/pdf/motordele_yse.pdf

I will ask a favor though.
When you get the problem sorted, please come back and let us know what it was and how you dealt with it.
Adds to the wealth of knowledge!
gary
 
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