HK wrote:
John H. wrote:
On Tue, 15 Apr 2008 07:21:42 -0400, "Bellsouth Newsgroups"
wrote:

"John H." wrote in message
...
went very well. That 18 footer with the 150 hp Yamaha is a screamer,
but I
only got it up to 3900 RPM. The day turned out beautiful, if a
little cool
and breezy. The boat handled the small (one foot) chop in the
Rappahannock
River with ease, and I was very impressed with the engine. The engine
rocks, almost noiselessly. At 3500 rpm I could carry on a
conversation with
the maintenance guy in a normal tone of voice.
Congrats!!!

Why only 3900? Is that a Yamaha break-in suggestion or are you
overproped? I just repowered my 17 whaler outrage with a 150 opti and
had to play some games with pitch and diameter before I got to 5400
RPM. Just curious..


I hadn't read the manual yet, so don't know the break in procedures. This
was just a test run. I'll save this post and try to remember to get
back to
you once I've read the manual and taken it out for a longer workout.


Your dealer didn't go over break-in procedures for the new engine?

My dealer prints up a one pager of significant instructions, encases it
in plastic, and puts it next to the steering wheel. This is *after*
explaining the various important procedures necessary to follow with a
new engine. My dealer also tank tests each new engine for a couple of
hours. It has a back-in outdoor tank in which engines may be run at all
throttle settings under load while mounted on the boat. Your dealer
didn't do this?

Hmmm.

The break-in period is 10 hours. For the first hour, you are not
supposed to exceed 2000 rpm. For the second hour, you are not supposed
to exceed 3000-4000 rpm, or the low side of 3/4 throttle.