Bukh DV10 problem - "full-load stop" adjusting?

[micha571]

I have a problem with a Bukh DV 10 LSME (Saildrive).
The mechanic which wanted to drain the cooling water turned on a screw which he thought to be the drain plug.
It was not, it was the “excentric for full-load stop”, screw no. 43 in the attached picture. He did not remove the screw completely, only turned it out by some turns, then turned it back in.
Afterwards, the engine was running, but did not rev up when moving the throttle lever. I turned the screw about ½ turn further, now it is revving up again, but has lost idle speed.
So I am sure nothing is broken or wrong, but I guess the screw has to be adjusted correctly again. Does anyone have an idea how to adjust this properly? I studied the explosion view (attached picture) for hours, but just don’t understand what this screw exactly does.
Any help greatly appreciated….


Regards, Michael

 

[vyv_cox]

I can understand your problem. My ever-unhelpful workshop manual doesn't even mention it and I'm not sure where you found your diagram, as I can't. Most Bukh owners report that a phone call to Bukh in UK will result in extremely helpful advice. Telephone: 01202 668840 (UK Only)

 

[micha571]

I found the picture here:

http://www.lsm-diesel.dk/2009/besti....&n2=Description&n3=Price excl. V.A.T.&n4=Qty

They have a complete spare parts list including explosion views as pdf online. You can download it, too. On the left hand menu, click on "Bukh parts", then on "DV8-10LSME", then "spare parts catalog".

 

[Malish]

thanks, a helpful link

 

[micha571]

bump..

 

[Jarmo]

Hello,

I have now same problem except I did it myself. How did you adjust the screw?

BR Jarmo

 

[VicMallows]

I found the picture here:

http://www.lsm-diesel.dk/2009/besti....&n2=Description&n3=Price excl. V.A.T.&n4=Qty

They have a complete spare parts list including explosion views as pdf online. You can download it, too. On the left hand menu, click on "Bukh parts", then on "DV8-10LSME", then "spare parts catalog".

Sorry I can't help with your specific problem, but very many thanks for that link - incredibly useful for my BUKH20.

 

[Bilgediver]

I have a problem with a Bukh DV 10 LSME (Saildrive).
The mechanic which wanted to drain the cooling water turned on a screw which he thought to be the drain plug.
It was not, it was the “excentric for full-load stop”, screw no. 43 in the attached picture. He did not remove the screw completely, only turned it out by some turns, then turned it back in.
Afterwards, the engine was running, but did not rev up when moving the throttle lever. I turned the screw about ½ turn further, now it is revving up again, but has lost idle speed.
So I am sure nothing is broken or wrong, but I guess the screw has to be adjusted correctly again. Does anyone have an idea how to adjust this properly? I studied the explosion view (attached picture) for hours, but just don’t understand what this screw exactly does.
Any help greatly appreciated….


Regards, Michael

From the description it is the fuel pump rack limiting device to control max power and also control acceleratioon to avoid smoke. This should not affect slow running so suggest you check the slow running screw on the speed(throttle) lever is correctly set. There is usually a minimum speed screw and max speed screw on the throttle lever quadrant near the fuel pump.

 

[Jarmo]

How do I know, what is right depht and position of that screw? I took it unfortunately off. Could I just screw it back and try to find right position by starting motor? Or is this eccentric crew now off from some arm?

 

[micha571]

That is correct.
With our engine, it turned out that the problem was a faulty injection pump, which didn't build up the correct pressure anymore. So the "full load stop" does really not affect slow running. However, if the screw is turned out too far, this could result in the lever (which acts against the screw) "slipping" past the stop screw. If this happens, the bottom cover has to be removed to put the lever back.
Michael

www.teamswashbuckler.com

 

[chewi]

I just discovered this screw at the top starboard of the rear casing, a 10mm head bolt with locknut.
I had a recon this winter (by a BUKH authorised agent), but the engine was reluctant to pick up or accellerate, though once it had it gave full power. It seemed like fuel starvation, but the pump side was fine and gravity assisted too.

The mechanic at Purbeck marine referreed me to this adjustment which does not appear on the DV10ME exploded diagrams, nor is there any defined method of adjustment, but it is a stop adjuster for the governor.
According to Norman Griffiths at Bukh it is to prevent overevving. In my case it was in so far it prevented acceleration, so after a reluctant start it would tick over but not rev up, even with throttle arm at flat out.

With the engine running in this state I opened the screw about half a turn and it made the world of difference. It now revs better, I can give burst of astern without taking a tea break. Another half turn improved it more still, but I think any more would have little effect.

 

[VicMallows]

I just discovered this screw at the top starboard of the rear casing, a 10mm head bolt with locknut.

Many thanks for posting that info.....hopefully 'filed away in memory' in case it's ever needed! Have been working away on my BUKH20 today and noted the screw you refer to. (removing gearbox to change input oil seal .... real pain on my boat as cannot reach lower two allen screws without raising engine ....then noticed one of the rear mounts has collapsed.......)