Help on 120s saildrive

[djrussell0]

Hi all,
My120s saildrive has developed a gear issue today. it does not select forward drive as gear/throttle is pushed forward then takes up drive with a bang. When lever is pushed in to the drive take up position with engine in idle you hear the mechanism snatching and only grabs if more revs are added. reverse is ok.

cable system looks ok tried pliers on each end of cable to see if they had rotated but they spring back to position. Its looks like you would have to release the threaded nipples on each end of cable to get any turns anyhow. Throw looks ok but didn't have time to take cable off and check throw against manual election on gearbox

this is making me very nervous when coming off my swinging mooring. I have a 6hp tohatsu saildrive as backup so will use that to get off mooring. engine and gearbox coming out at end of this season for saildrive seal and engine overhaul anyhow so don't really want to have it in and out this side of season.

Thoughts????

 

[prv]

First of all, why not try disconnecting the gear control and moving the lever directly? I could do that on my own at my pontoon berth, though maybe you wouldn't want to engage drive while tied up to a mooring and would do it free-floating with someone else in the cockpit to keep watch.

Disconnecting should just be a split pin pulled out - I had my controls out this winter to rebuild the binnacle.

Pete

 

[djrussell0]

Hi Pete, that's my next task next weekend.

Dave

 

[djrussell0]

all sorted there was not enough throw forward for ahead and reverse was over pulled also tick over a bit high, one thought though. the cable has thread each end for nipples so adjusted to push more forward for ahead but it left it a bit shy of full pull for astern. can not see any adjustment in cam system on gear throttle lever. how do you get the push and pull just right? as getting one perfect effects the other.

 

[Martin_J]

It should not need changing... and you've not indicated which type of control lever you have.. but at the throttle/gear control lever in the cockpit, you generally find that where the cable attaches there is a row of perhaps five attachment holes. As you can guess, the holes closer to the pivot give less movement and further from it give slightly more.

And some even have another set of holes (that would lie between the holes you see) and the other end of the shift rod.. By turning it upside down you get another set of shift distances.

As you are trying., Yes, you really need to get the gear change cable set so that it is perfectly in line with where the gearbox shift lever sits, in both the forwards and reverse directions (as seen with the cable disconnected at the gearbox end).

 

[Martin_J]

It is worthwhile trying to get this accurate since the 120S gearbox does not take well to running with any slight pull (in either direction) on the shift lever. The golden coloured clutch cones can wear quickly if the setting is not spot on. You would notice wear as fine gold coloured dust like particles settled in the gearbox.

 

[djrussell0]

thanks Martin I have a Teleflex TFX, what I'm struggling with is I can not see any kind of adjustment to alter the throw of cable at lever end. I need a few mm more throw in total I guess I just centralise the cable in neutral once I get the total throw I want. I think I will remove lever as perhaps there is some sort of adjustment in the cam system.

Dave

 

[djrussell0]

just found manual on YBW, there is a cam adjustment and extra Travel adjustments here is link (you may have t go in to the oddsods and section


http://www.troppo.co.uk/odds/TX Controls B700SS.pdf

 

[Martin_J]

Looks like a good document.. And for the gear shift it does seem to show a couple of holes in the lever. I seem to think that the lever might also be reversible and the holes on the other end of it are just slightly different distances from the pivot (although I'm thinking back to a previous boat now).

Worth getting neutral exact as well. It's a little annoying when you bring the control to Top Dead Center as you berth.. step off.. and then find she's still in gear ticking over oops!

 

[djrussell0]

Martin, you were spot on, armed with manual and another look at Teleflex I noticed that the cable had been fitted to the inner hole and as standard should be on outer giving a extra 7mm of push and pull(exactly what I was missing) cable looked very newish so I guess fitters error. as belt and braces I got a cheap 120s saildrive as a spare on Ebay and cone clutch looks like new so have a full backup of spares for a winter rebuild if needed

many Thanks Dave