marinising

Don't know of anybody who sells marinising equipment these days. Self marinising except for some old engines where they were popular in the past has gone the same way as home completion boats.
 
The older 3 cylinder Nanni was a marinised version of the Kubota. The marinised parts are or were available from A.E.Peachment 01603 714077 as spares but they will not be cheap! For the other Kabota parts (at normal prices) try Universal Engine Power 01371 875331.
The bottom end of the Kubota is substantial so a top end O/H (valves guides springs,reseated inlets, new hardened seat exhausts, piston rings -after a light honing of the bores) might be a solution if you can find a cheap "well worn one". This cost me £290 with a gasket set, plus £100 for the machine work. O/H of pump £170 and three injectors £75.
My 3 cylinder Nanni has direct raw water cooling into the exhaust manifold i.e. no heat exchanger.
Nice to be able to put a little back in to the forum rather than picking brains all the time.
VITALBA
PS I believe there is a new 3 cylinder Nanni which may make the the old type marinised parts difficult to replace in the future.
 
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I was faced with re-powering, and balked at the $30,000 wanted for a 30 hp Volvo, but found a brand new Kubota was $6,000, if I could marinise it. My brother is a very talented amateur patternmaker, so he guided me in making the patterns and coreboxes for a water-cooled exhaust manifold, which was quite successful. Cooling was by keel pipes, and the exhaust pipe was jacketed copper. Keel pipes on the starboard side cooled the engine and on the port side the Velvet Drive gearbox and the exhaust pipe. A second water pump drove the circuit for the gearbox and exhaust pipe, and it was driven by belt from a second pulley on the crankshaft. All-in-all, quite successful.
Peter.
 
I am marinising a Kubota D950B at present.
Story so far is I removed an ancient single thumper Sabb 8hp and obtained a damaged marinised Kubota for nowt and have salvaged the gearbox, the mountin flange and some other small bits.
I bought a second hand Kubots D950 for £200 on ebay and it runs fine. The D750, 850 and 950 are very similar engines except for fuel pump and cylinder size.
Manuals are easy to obtain online but dont make the mistake I did early on thinking a D905 is the same engine - it isnt by a long way.
Beta and Nanni engines are marinised Kubotas and they seem to last for ages, a friend of mine has a Beta version (I think its based on a D722) one in his Eventide for 12 years and it runs like a sewing machine.
The old engine head was shot along with the heat exchanger so I am off down the road you are to get the remaining marinising bits. (hopefully) My first stop will be Lancing marine as they seem to have a good reputation of sorting peoples requirements.

PM me and I will keep you updated if you like
 
Thanks Guys for the input

Sorry no reply for a while computer probs......
The reason is I can get my hands on a second hand kubota mini digger/tractor engine so cheap and theres a lot out there to choose from. I can now also say I have learnt that the heat exchanger replaces what a radiator would do and the cooling sea water from that used to cool a jacket around the exhaust too. So does any one know if there is any rules of thumb/formulas for the size of heat exchanger used for a particular engine size??? I already have a jabsco water pump to punp the water. I see that the sump on the kubota is quite substantial and short versions with oil pumps incorperated are readily available.
 
Engine and Exhaust cooling

The conventional method is to use a combined heat exchanger and water coooled manifold and these are available for a number of engines. The main suppliers is EJ Bowman in Birmingham but from my reading of their list, they do not seem to make one for your engine but you should give them a call.

John
 
Does the exhaust manifold need to be cooled aswell? is there a fire risk here? Or can you have a waterjacket after the manifold which will remove heat there The last thing I want is a dangerouse boat.
 
Superslooper said:
Volvo Penta MD2 Diesel has any one had any experience with this engine any good?
Click to expand...

Plenty of them in use over the years but now at least 3 generations obsolete. Heavy, old style engine. Spares expensive and becoming difficult to source.

Assume from your other posts you are working on an old boat and limited budget. Engines are always a problem. Any one selling second hand is probably doing so because the engine is knackered and is being replaced with a new one. Occasionally you get people going up size and replacing a good engine, but rarely. Unlike cars, boats dont get written off with good engines. As you have discovered marinising a non marine engine even the same base engine is not easy as you need a lot of expensive bits.

Don't have a solution and you just have to keep your eyes open. Some dealers like Cellar Marine do recondition old engines, but the range is limited.
 
re marinising

Another vote for Bowman

I had a look at their website as i was looking for a new heat exchanger for my MD21A - they do lots of manifolds / heatexchanger packages for conventional car based diesel engines which will allow conversion of a basic diesel. Works for bigger engines.

This still doesn't however address - Engine mountings, a gearbox, electrics and all the associted hassle associated with making it work.

if your only needing a small engine you may be cheaper buying a packaged new engine.

If moneys really tight i'm going to swear and suggest a transom hung second hand outboard

Good luck...

Cabatach
 
Yuck aint going the outboard way I have spent a lot of time and effort getting a mohogany transom looking chippendale....ish I will save a bit more dough and get a recon beta I recon a two cylinder 10-15 hp will do but in the mean time keep my eyes peeled too. Its been a good post though thanks for all your inputs I have learnt a lot about marinised engines on the way and that is invaluable.

YBW rules fair winds Andy
 
Somewhere, I do have a magazine article which shows pictorially how to marinise an engine. I followed it to marinise a Ford 1.6 diesel. Let me know if would be of use.
 
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