"DownTime" wrote in message
om...
Late last year we purchased a boat(approx 2400 pounds) with a single
Yamaha
300 HPDI. So far, and just over 100 hours, all has been well and no
problems.

During a recent vacation in the Florida Keys, a local mechanic, who was
working on a friend's boat, was going on and on about the problems he
has
seen with this particular engine.

Some folks, not all, have had plug fouling and lack of power problems with
both the 250 and 300 HPDI motors. Some problems are fixable such as the new
computer, oil pump, and plugs for the early 250s that the factory sent,
along with a case of outboard oil to customers. Most of the problems seem to
occur in Florida, probably due to the numbers and year 'round boatin there.
Some web sites to check out are iboats.com and thehulltruth.com which have
had a lot of discussions about theHPDI motors.

Bill Grannis
service manager