Difference between Volvo Penta MD2040 and MD2030

[gordonhinds]

I rather stupidly destroyed my MD2040 by running it at idle with the oil pressure gauge disconnected... I wasn't on board and the oil pumped out through the gauge pressure connector and yes, the engine stopped. The bearings are shot plus some other stuff. It runs at idle OK so it might be fixable.

The options are to rebuild the 2040 but I'd like a smaller engine (it will fit better in the engine bay) so the 2030 sprung to mind. Hard to get so maybe a brand new D1-30?

The questions to the brains trust are;

What are the differences between the 2030 and 2040? Ditto the ID30 and 2040?

And will the existing gearbox fit the 2030 or the ID30? It's a MS 2AB?

I will check the specs for the new folding prop I have with the prop guy.

Stupidity is expensive.

[GordMay]

They’re both 3-cylinder diesels.
The MD2030 is rated 29 hp at 3600 r.p.m.; whereas the MD2040, is rated 40 hp at 3600 r.p.m.