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I can't make it out either, not my engine I got the pictures from a for sale site in NZ.

Found this picture from the red engine (which is not mine)

They are a direct raw water cooled engine (as opposed indirect with a heat exchanger).

If they are marine does anyone know who might have made them? I have a set of the manifolds and I cant find any makers name.

same engine

engine with them on....

more

Are these manifolds from a marine conversion or from flathead V8 engines that were made for stationary power plants, maybe during war time?? I have seen three sets of these now.... two had the same universal shaft drive out the back without a gearbox. They seem to common and FAR to heavy to be...

Yes good points. The first step at least will be bending the oil pickup to be parallel to the bottom of the boat. Next step if needed will be extending the sump, keeping the same point where it's deepest and going forward and back to get more volume and a flat pick up area and to lower the oil...

And the other side....

Another angle...

Taking shape... Worked on mounting the spark arester tonight and working out the in and outs of the expansion tank. Still got to shorten the spark aresster for deck clearance. Looking more like a motor every day. :)

"Marine grind" is not really the right term, "marine grinds" is more to the point. It's like saying "car grind" there are as many different applications in boats as there are in cars. My boat is small at 16 feet. Planning hull. Relatively light weight. Two person only. No skiing, no towing...

I have an older mechanical pump for mine with a glass sediment bowl, but I have removed the pushrod and I will run a hidden electric pump and regulator to control the pressure. I will have the fuel come from the hidden pump and reg up and through the pump just for show.

Cool project! Do you have photos posted any where?? It's good to have someone else out there using a flathead for something different and learning as they go. :) Are you going to fit electronic ignition in the divers helmet dizzy? Might negate all the talk of vacuum lines altogether? I am on...

And carb on work in progress manifold....

Manifolds.....

Heads underside...

Heads....

The boat motor had another good week. Weiand 400 heads arrived. A set of marine wet exhaust manifolds and a rebuilt 1 1/6 carb. Plus the pulley saga in another thread. Back to thinking of a cam now. The 8BA cam already has 8mm so it should regrind well with plenty of meat. Thinking about an...