Bukh DV20 (Can I see yours ?)

[boatbodger]

Hi all,

The last 2 boats we've owned have had Lister SR 3 engines. The current boat has a BUKH DV20. I have a couple of issues to resolve.

 

Firstly, the engine takes far longer than the Listers to increase or decrease in revs, it seems to wind itself up and down.

I don't know if this is due to the large flywheel or a fault.

 

Secondly I have what I think is a sticking centrifugal governor. I've followed the fuel system and had the injector pump, Injectors & lift pump serviced . And am confident all the fuel delivery side is fine.

 

The engine starts O.K, better now I've installed a cold start unit. But if you let the speed drop too far. The revs drop to about 300 rpm and then won't pick up again.

 

The only course is to stop the engine, re-start it and all will be fine till the next time. Usually problems occur when reducing revs to change from forward to reverse gear and vice cersa.

 

So having to switch off the ignition, switch on again, restart and give it a burst in reverse before you hit the boat you were trying to moor behind can be a bit tricky.

 

What I'd really like to do is see another BUKH in action. I live in Derby and could travel anywhere in the midlands. I'm pretty sure I can sort the stickiness but I'd really like to hear another one running.

 

 

If any BUKH owners can help please PM me.

 

Thanks in anticipation,

 

Peter.

[Tony Brooks]

Hi all,

The last 2 boats we've owned have had Lister SR 3 engines. The current boat has a BUKH DV20. I have a couple of issues to resolve.

 

Firstly, the engine takes far longer than the Listers to increase or decrease in revs, it seems to wind itself up and down.

I don't know if this is due to the large flywheel or a fault.

 

Secondly I have what I think is a sticking centrifugal governor. I've followed the fuel system and had the injector pump, Injectors & lift pump serviced . And am confident all the fuel delivery side is fine.

 

The engine starts O.K, better now I've installed a cold start unit. But if you let the speed drop too far. The revs drop to about 300 rpm and then won't pick up again.

 

The only course is to stop the engine, re-start it and all will be fine till the next time. Usually problems occur when reducing revs to change from forward to reverse gear and vice cersa.

 

So having to switch off the ignition, switch on again, restart and give it a burst in reverse before you hit the boat you were trying to moor behind can be a bit tricky.

 

What I'd really like to do is see another BUKH in action. I live in Derby and could travel anywhere in the midlands. I'm pretty sure I can sort the stickiness but I'd really like to hear another one running.

 

 

If any BUKH owners can help please PM me.

 

Thanks in anticipation,

 

Peter.

 

 

Yes, but mine's a DV36 that uses the Bosch rotary pump AKA Ford Escort but only three cylinders.

 

My best advice is to phone TW Marine at High Peak who really know the Bukh range in canal use. They are exceptionally helpful and will, I am sure, get you sorted.

[boatbodger]

Yes, but mine's a DV36 that uses the Bosch rotary pump AKA Ford Escort but only three cylinders.

 

My best advice is to phone TW Marine at High Peak who really know the Bukh range in canal use. They are exceptionally helpful and will, I am sure, get you sorted.

 

 

Thanks for the response Tony. I have been speaking to William Webb at T.W Marine, it was he who recently serviced my injector pump. And I cannot praise him too highly for his helpful suggeestions and advice and the wealth of knowledge he's willing to impart.

 

It was really a question of do Bukh's respond to revolution adjustments slowly compared with say a Lister which is what I'm familiar with>.

 

Once again thanks for the response.

 

Peter.

[Tony Brooks]

Thanks for the response Tony. I have been speaking to William Webb at T.W Marine, it was he who recently serviced my injector pump. And I cannot praise him too highly for his helpful suggeestions and advice and the wealth of knowledge he's willing to impart.

 

It was really a question of do Bukh's respond to revolution adjustments slowly compared with say a Lister which is what I'm familiar with>.

 

Once again thanks for the response.

 

Peter.

 

 

Almost certainly YES - I think your flywheel is larger than the Listers (certainly a lot larger than an SL one) and that leads to two problems:

 

1. A much slower rev up, but that does not explain the refusal to rev up from 300 rpm which could be a lack of fuel possibly indicating a worn out lift pump but it could be a lot of other things so I am not really giving an opinion.

 

2. Black smoke during the rev up period because the governor is supplying maximum fuel to try to accelerate the engine but the inertia in the flywheel is holding the revs down.