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| Repower Articles |
| Nido Del Mar - Repowering a 48 foot Offshore Yachtfisher |
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| We were very lucky. For us very few things
went wrong. There were very few surprises. The big question was "would
we get the 15 kts we were hoping for?" |
Sure the computer models said we would, but what would really happen in
the ocean. When we hit the throttles would we fall back in our seats or
wish we had bought another boat? The one thing our mechanic, or for that
matter any mechanic, couldn't tell us was how fast we would REALLY
go. They all told us every boat was different and we would have to wait
and see what the final outcome would be.
The day finally came for the Sea Trial. We had waited
a very long time for this day and it was a long ride to the boat yard. We
were anticipating the worst as the day before our mechanic had taken the
boat out for a "pre" sea trial. I had spoken with him after his
return to port. In a very somber tone he had refused to tell me how fast
our boat was, just to wait and see when we got there.
We arrived at the dock and climbed aboard. After a few adjustments we were
off. We drove the boat slowly out of the harbor. You could feel the power
of the new engines even at idle. The sounds, vibrations, feel of the throttles,
everything was different. As we left the breakwater we slowly pushed the
throttles forward. |
The rpm's came up and you could hear the Turbo's kick
in. Suddenly the bow of the boat rose and immediately climbed onto plain.
As we brought her up to 2800 cruise RPM we hit 18kts. YES! Boy we were happy!
Then we pushed the throttles to full speed and the boat broke 21kts. We
were shocked! We had never expected our 20+ ton 48 footer to go that fast.
Happy as clams we put the boat through her paces without any problems. After
dropping off our mechanic we returned to our home dock with grins from ear
to ear. For us everything had worked out beautifully.
PS For the record our mechanic was Tony Athens of Seaboard
Marine in Oxnard. Thanks to Tony's great work we have what I consider a
"New Boat". Tony also has a website and looks after the Cummins
and Yanmar Forums for Boatdiesel.com . I can recommend his work and customer
support highly. |
| FOLLOW UP -
by Tony Athens (Jan '00) |
ADDITIONAL SPECS:
Propellers - 26x26 3 blade. Nibral, light cup.
Transmissions - ZF IRM 280 A 2.5 ratio (chose these over the 220A due to
angle and robustness). |
Hit 3125 RPM on sea trial and 28 psi boost. Definitely
using the hp, but had room to get heavier and dirtier. Had I NOT
gone in with props that would allow this boat to go 100+ over rated, the
owners would definitely have not been happy. To date they've got 800+ hrs,
and they use everything these little engines have when cruising around.
I would say that this repower is the best example to date that I can use
to stress the point that propping a little light at first goes along way....
Regards, Tony |
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Nido
Del Mar - 48' Offshore Yachtfisher |
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