Compared to newer engines they are noisy, vibrate a lot, do not burn clean, spare parts
are VERY, VERY expensive and increasingly hard to find, and there are very few good mechanics available for things like calibrating injectors or major overhauls. I replaced the Safari's MD6B with a 1 cylinder Yanmar
and the 34's MD2B
with electric propulsion
, and both were good decisions (both original engines were in bad shape).
Now, if the prospect boat has an engine
with good compression
, that starts easily in cold weather
, and burns without smoke, most likely you'll have plenty of engine hours before needing an overhaul
or replacement. They only require minimum care and if you are handy, the most common repairs
are simple. And they are reliable when properly maintained. The hand cranking was a nice feature to have if the batteries were depleted.
If the engine has a hard time to cold-start in 50 degrees, have someone check its compression
. This applies to Volvos and to any other brand, mostly considering that we are talking of 37 year old engines.
One more thing to consider is that when it is time to re-power, if you switch to a different brand you'll need a new propeller
, as Volvos turn the opposite way than the others.
Despite the Volvo
, I consider the Dufour 31 a fantastic boat, and I always recommend them to friends in the market.
My 2 cents...