Hilton

Bump for updates - and to point out the other thread about the 32V 928 boat engine for sale currently

https://rennlist.com/forums/928-foru...oat-motor.html

MarkRobinson

my boat's on hold... for a few more weeks. Motor is about done but is going into a 951 racer for the summer for break-in

Tass 928

My boat is slowly getting finished. I had to scrap all of my exhaust plans and start over. I bought a new set of water cooled manifolds, welded them up and then port matched them to the heads. From there I went with stainless pipe out to a pair of supertrapp mufflers. I have some pics but they are on my old phone and I need to retrieve them.
Next up for me is to pull the engine, gas tanks and misc. gear so I can get the hull to the body shop.

I actually have all of the factory parts that are shown in the current ebay offering. I'm using a 16 valve euro so most of the manifolds are of no current use to me. I did use the bell housing and parts of the coupling. The total marine package is VERY heavy. I would guess it adds 200 pounds to an engine.

TheFlyfish

I don't know if it's allowed to resurrect old threads, but how is it going with this?

I'm asking since I have a similar plan. I have an 18 footer with a Volvo Penta sterndrive mated to a GM 4.3 V6 that I would like to replace with a 4.5 16V euro engine I have laying around.

U-928

I think this project got abandoned a long time ago. The boat was long gone the last time I was at Tass'

Tass 928

Turns out my hull was a pretty rare piece and someone wanted it more than I did. I let go of the hull and trailer but kept the euro motor and all of the 928 marine parts.

Then I got a bit side tracked with street rods and vintage motorcycles so garage space has been filling up. I now have another shop space to work in and the barn has become storage only.

The 928 boat project is not quite dead. I'm shopping for a donzi sweet 16 as the next candidate. It will be a bit smaller (so easier to store) yet still a pretty classic boat and of the era that suits the engine.

TheFlyfish

Ok, good to hear that it's not laid to rest for good. My own 928 boat engine project has a low priority since the boat runs fine with the V6 engine and I have another huge boat project. I have been working with boats for more that 20 years and have a plan, more or less, for what needs to be done, to convert the engine into marine use.

Amongst the things that has to be done, is probably another oil pan/sump. The deep end of the oil pan, is in the front of the engine, and since the boat is always going uphill, most of the time, I have a fear, that there will always be a lake of oil in the rear of the engine, slushed around by the crankshaft. Not happy about that.

And since the original engine foundation in the boat will hit the oil pan, I'd rather redo the oil pan, than the original fiberglass work in the boat.

The overlap on the camshafts seems to be ok for marine use, no risk of water intrusion from a watercooled exhaust manifold. My plan is to build a set of water jacketed exhaust manifolds, where water is mixed with exhaust, far away from the port on the cylinder head, like Mercruiser manifolds.

I appears that many automotive cams has a substantial overlap, which can result in water intrusion, but as far as I have measured, it should not be a problem on the 4.5 16V engine.