Lighter vs heavier diesel engine

[deblen]

My opinions Volvo,Yanmar,Beta/Nanni-all basically good engines.
Your choice should be influenced quite strongly by:


1.Parts & service in your area.
2.Other owner's reviews of the service shop.
3.Source/price of parts. eg. Volvo,Yanmar-usually available from OE mfgr & expensive.Beta/Nanni-based on common Kubota engine used by many tractors & other non-marine so parts can be much less expensive.
4.Installation complexity/cost. eg.How much modification $$ to fit new engine in old boat?


Cheers/Len

[Tortuga's Lie]

I would also like to add that you should make your choice not only on parts availability but on ease of access for replacing those parts and regular maintenance, especially for your particular setup. For instance, I have an older Yanmar(3JH2-TBE) that has been great in the 8 years I have owned it but the accessibility to change out the impeller is awful, the engineers who designed this engine should be made to suffer! I have to drop the alternator to be able to reach the cover plate to the impeller, as this is facing aft not forward. Even if I had a better side panel to the engine compartment, it wouldn't make that much of a difference. So, ease of maintenance is key!

[boat driver]

Originally Posted by deblen

My opinions Volvo,Yanmar,Beta/Nanni-all basically good engines.
Your choice should be influenced quite strongly by:


1.Parts & service in your area.
2.Other owner's reviews of the service shop.
3.Source/price of parts. eg. Volvo,Yanmar-usually available from OE mfgr & expensive.Beta/Nanni-based on common Kubota engine used by many tractors & other non-marine so parts can be much less expensive.
4.Installation complexity/cost. eg.How much modification $$ to fit new engine in old boat?


Cheers/Len

Alll parts are expensive. Kubota no cheaper.
Otherwise begin with fitting and then follow list.
But to suggest your. Weight questions in simplicity-
Vibration is a product of engine rpm and balance- ie design quality.
Weight begins to be modern technology driven and can be a product without a great deal of longevity experience. Recreation operation tends to average 100 hours a year so engines really never get broken in but suffer more often with corrosion and bad fuel problems before the hours begin to show mechanical failures.
Additionally. Many vessels are going to generator operations instead of stored power, and desiel electric. This allows technology to focus on predicted load engines- thereby reducing weights among other efficiency.
If really reaearching- derive the original use of that specific design/block.
That may help you answer your question