In article . com,
"Bob" wrote:

Repower for the 21st century
Or
Rebuild a 1979 Yanmar 3QM30H (raw water cooled)?


We repowered when we got Xan. Am not likely to do that again. The costs
are about double the engine's, and the labor and time MUCH longer. At a
minimum, you'll need a new shaft and prop. [but you might want to
upgrade the prop anyway, as there have been some real improvements since
the raw-water Yanmars were made.]

A new 2GM20 will put out about the same power, perhaps more, and give
improved efficiency, but unless you're planning to keep the boat for 20
years, you won't realize much real benefit.

The Yanmars, old and new, are work horses. Ours has 1200 hours and about
all I need to do is change the oil and inspect the rest -- and keep the
fuel clean, the only problem we've had other than a plugged cooling line
at the inlet.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's NEW Pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/