Originally Posted by Alan Wheeler
Maybe not the issues with the Volvo saildrive, but the specified maintenance schedule is higher and very expensive. If you applied the same maintenance schedule to the yanmar, I suggest it would not give problems either.
I don't know about the Yanmar saildrive maintenance, but the Volvo maintenance schedule is changing the oil
every few hundred hours, zinc as needed, shaft seals
as needed (mine are going on their 9th year with no issues) and rubber boot every seven years. The oil
is the same price
whether the saildrive is Volvo or Yanmar, the zincs are US$13 (boatzincs.com), the shaft seals
are US$15 each (need two) and the rubber boot costs a newborn and a right arm. In changing the zinc, you will need to replace a lock washer (US$0.93) and, although it is not recommended in the manual, I think it is a good idea to replace the bolt (US$2.95).
I use a recent purchase
for determining those prices, and the maintenance schedule is from my Volvo saildrive manual.
While it is possible that the Yanmar drive could save money
by going longer without an oil change
, the cost of zincs and shaft seals can't be much different. Could be a good bit of cost savings on the rubber boot - I don't know the Yanmar price
. If the sole determining factor in reliability
is the difference between $20 of oil spared over several years on the Yanmar, then if I had a Yanmar, I would be sticking to the Volvo maintenance schedule.
All in all, I don't think the emperical evidence I see for reliability
issues with Yanmar saildrives has to do with service
I do, however, defer to someone with more experience with both drives or someone like Pat whose business is knowing this stuff.