Does anyone have a North American supplier for the zincs? I've found them in Europe but so far, striking out on this continent.

My yard is looking for a lower seal unit and the Louisiana supplier will be ordering through Europe. Putting my launch off two weeks unless I chance it and do a quick haul later. Always something!

There are not many shops who sell Bukh parts. Europe is the only solution and their pricing is quite good compared to past dealers in North America.

I use LSM Diesel in Denmark as they seem to have better pricing than Bukh...

http://www.lsm-diesel.dk/2012/bestil.php?lang=uk&txk=initshop&n0=4&n1=Partnr.&n2=Beskrivelse&n3=Pris%20ekskl.%20moms&n4=Antal

more info:

Best fuel filter for our Bukh is Fram P4506PL it's for european diesel
trucks (just learned this) available at most autoparts stores her in North America, much cheaper than the comparable Bukh part.

I had to change the top plate crank seal (under the flywheel) and this
one worked fine (much cheaper)
https://www.amazon.ca/Precision-42X56X7-Seal/dp/B00A8CS7SM/ref=sr_1_4?ie=UTF8&qid=1526228267&sr=8-4&keywords=seal+56+x+42+x+7" rel="nofollow - https://www.amazon.ca/Precision-42X56X7-Seal/dp/B00A8CS7SM/ref=sr_1_4?ie=UTF8&qid=1526228267&sr=8-4&keywords=seal+56+x+42+x+7

I have used these prop shaft seals with success a few times
(substantially cheaper than Bukh)
https://www.boats.net/product/tohatsu/346650130#" rel="nofollow - https://www.boats.net/product/tohatsu/346650130#

Fuel Lift pump (better design)
https://www.ebay.com/itm/Ruggerini-Fuel-pump-Marine-engine-FIDO-RD-1-CRD-1/152139263679?hash=item236c34eebf:g:nHEAAOSwwpdW71QL" rel="nofollow - https://www.ebay.com/itm/Ruggerini-Fuel-pump-Marine-engine-FIDO-RD-1-CRD-1/152139263679?hash=item236c34eebf:g:nHEAAOSwwpdW71QL

Substantially cheaper and this fuel pump's mounting flange doesn't warp and therefore does not leak oil. The original Bukh fuel lift pumps warp on both axis's and leak oil as a result.
This new one has a thicker stronger designed flange. You use the gasket
it comes with and it works great. All you have to get are 2 x cap screws
as there isn't enough space to use the nuts that are used on the
original pump. This means you remove the studs and replace them w/ cap
screws.

In fact, the American Boat and Yacht Council only recommends magnesium for freshwater use.

As a bonus, it is better for the environment.

Since a magnesium anode only lasts 1/3 as long as a zinc, it is not recommended for saltwater use as it would corrode away during the course of a single season.  Freshwater, being much less conductive, does not have this issue.  

The drawback is the increased replacement schedule, since the prop needs to be removed in order to replace the anode on the L28.

Is there a cross for the Thermostat . I know Bukh no doubt did not make it , and it probably is in other engines . Friends Laser, #104 seems to be running stone cold - think the old owner maybe  took out the stat.