Bukh DV-8 vs DV-10

Are you sure the shop got your pics Bob? Some email accounts can't handle that much data.
BTW - Bill has been ill.

js

frfletch,

That's too bad Bob. Bukh heads are rare. Do you have the failed head? There was a machine shop in Canada that had some skill in reconditioning failed heads although I was told success was 50/50. It would take some detective work to find out if they still exist.
You can also scour the web of Europe although language can be tricky. Like this https://www.kkemotorer.dk/topstykke-ventiler-knastaksel/2922-solgt-topstykke-dv-8-10l-brugt-used.html
john

That pump looks stack-able but I wonder if  it's 2 shafts or one long one. The base of that pump also looks like it's the one with a bearing instead of the bushing design the older pumps use. But in order to change impellers I would have to assume they would be separate shafts.

Edited by Bill Layton - 19 October 2017 at 9:08am

Neat , however I just put a brand new pump on , not worth switching as fresh water boat .  Would have bought the dual at that time though . 

Dang - if I had known I would have put that on when I replaced my pump this summer . I don't like the raw water in the engine even though I am fresh water 

Warbirds has been circulating warm anti freeze for about five years on the same rubber or nitrile impelle. That coolant does not reach the same temperature as the head. howevervthe Orbedorfer centrifugal is very reliable as well. To anyone doing this the idea of a double Johnson pump that mounts on the standard mount sounds slick. I can't imagine that it comes up as high as the flywheel.

Interesting kit you found there. I'm considering an FW conversion too but I was hoping to find an equivalent to this: http://www.pumpvendor.com/Johnson_10-24143-1.html.

That pump is discontinued but if it were available it would fit in the same 'receiver' as the Johnson pump the Bukh is supposed to have. I was hoping to find a Sherwood 'or equal' but I haven't had time to research since last week.

I had the heat exchanger built by San Juan engineering in Bellingham, WA. I have done two conversions and the last one they charged me about US$380 for it. I kept the original Johnsen Pump to circulate the sea water and on the first project, Voila,I purchased an Oberdorfer centrifugal pump to circulate the anti-freee coolant. On the 2nd project for Warbird, I used a Johnsen impeller pump that had the same impeller as the original on the Buhk. These were both pedestal-type pumps mounted onto a bracket I cut from 3 x 3 x 3/16" aluminum angle bolted to the port side of the engine where one will conveniently find about 6 female bosses with 8mm threads that work perfect for mounting the bracket. The pump its bolted to the bracket by two 8mm bolts. The newly added pump is driven by a small belt from a pulley I attached to the top of the flywheel. Just remove the flywheel nut, stick the pulley on, and tighten the nut. I machined that myself so that the flywheel nut sat down inside the pulley hub with sufficient space to get a socket onto the flywheel nut. I then machined a standard pulley to fit onto the new pumps. On the first conversion I used an A section belt, but I found an L section for Warbird's conversion that is such smaller and runs much smoother. These pumps draw about 1/32hp, so one does not need much. I have been running mine since about 2010 with zero issues and I'm comfortable to know that my engine is not being slowly eaten away, particularly he cast iron head. BTW, both secondary pumps were found on Ebay,new for about $35.00, belt is about $5.00, so it is a cheap conversion. I think photos of it are still on the forum somewhere if you look back into the history.