Repower of a 2004 Nantucket with 150 Mercury 4-Stroke

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Author Topic:   Repower of a 2004 Nantucket with 150 Mercury 4-Stroke

hhagan posted 11-24-2013 09:18 PM ET (US)
Here is a 5 minute video with information on my repower of a 2004 Boston Whaler Nantucket, originally equipped with a 115 Mercury 4-stroke and upgraded to a 150 4-stroke.
http://youtu.be/U0UclgMvsOY
Mambo Minnow posted 11-26-2013 06:23 PM ET (US)
Nice video, the decibel level of the motor under load is impressively quiet.
Did you install the new motor yourself or did a dealer do it?
hhagan posted 11-26-2013 11:00 PM ET (US)
Webster Marine on Smith Mountain Lake did install and took my old engine in trade. Very nice job. Professional.
macfam posted 11-27-2013 07:44 AM ET (US)
Hugh,
Very nice!
The video was interesting.
At the end, the rpm's were 4900 or so. After researching Mercury's website, they have numerous performance reports on various boats using the new 150 EFI 4- stroke (not Verado).
Virtually all of these performance reports conducted by Mercury were in the rpm range of 5700-5800 for WOT peak performance.
Perhaps you could consult Tom W Clark on this site to see if he recommends a prop that would reach that optimum rpm.
Love your boat, and that engine is a great match.
Peter posted 11-27-2013 09:45 AM ET (US)
If 4900 RPM was the top RPM (not clear) then moving to a lesser pitch propeller to achieve higher RPM at WOT will improve the hole shot. Downside might be that noise may increase at cruise due to higher RPM at cruise.
hhagan posted 11-28-2013 07:55 AM ET (US)
That was not WOT. I have had it at WOT and it was running about 44mph. That was a warm day with flat, calm water and a quarter tank of fuel. RPM was right at 5500. You are right about the engine being a good fit for that boat!
martyn1075 posted 11-28-2013 07:08 PM ET (US)
I'm surprised Boston Whaler does't offer it as an option for the 2014 190 outrage. The buyer has to either purchase the Verado 150 or Verado 200 as the upgrade.
macfam posted 11-28-2013 08:49 PM ET (US)
OK, I thought from the video, that 4900 was WOT.
5500 is on the money.
jimh posted 12-27-2013 02:54 PM ET (US)
[Moved to PERFORMANCE.]
jimh posted 12-28-2013 11:42 AM ET (US)
I added some comments on the YouTube page about your presentation. (ASIDE: on YouTube you can now comment using your Google+ identity, you can edit your comments after posting them, and the person originating the posting of the video can manage the comments. These are all relatively new features on YouTube which greatly enhance the comment segment of the page.)

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Author	Topic: Repower of a 2004 Nantucket with 150 Mercury 4-Stroke
hhagan	posted 11-24-2013 09:18 PM ET (US) Here is a 5 minute video with information on my repower of a 2004 Boston Whaler Nantucket, originally equipped with a 115 Mercury 4-stroke and upgraded to a 150 4-stroke. http://youtu.be/U0UclgMvsOY
Mambo Minnow	posted 11-26-2013 06:23 PM ET (US) Nice video, the decibel level of the motor under load is impressively quiet. Did you install the new motor yourself or did a dealer do it?
hhagan	posted 11-26-2013 11:00 PM ET (US) Webster Marine on Smith Mountain Lake did install and took my old engine in trade. Very nice job. Professional.
macfam	posted 11-27-2013 07:44 AM ET (US) Hugh, Very nice! The video was interesting. At the end, the rpm's were 4900 or so. After researching Mercury's website, they have numerous performance reports on various boats using the new 150 EFI 4- stroke (not Verado). Virtually all of these performance reports conducted by Mercury were in the rpm range of 5700-5800 for WOT peak performance. Perhaps you could consult Tom W Clark on this site to see if he recommends a prop that would reach that optimum rpm. Love your boat, and that engine is a great match.
Peter	posted 11-27-2013 09:45 AM ET (US) If 4900 RPM was the top RPM (not clear) then moving to a lesser pitch propeller to achieve higher RPM at WOT will improve the hole shot. Downside might be that noise may increase at cruise due to higher RPM at cruise.
hhagan	posted 11-28-2013 07:55 AM ET (US) That was not WOT. I have had it at WOT and it was running about 44mph. That was a warm day with flat, calm water and a quarter tank of fuel. RPM was right at 5500. You are right about the engine being a good fit for that boat!
martyn1075	posted 11-28-2013 07:08 PM ET (US) I'm surprised Boston Whaler does't offer it as an option for the 2014 190 outrage. The buyer has to either purchase the Verado 150 or Verado 200 as the upgrade.
macfam	posted 11-28-2013 08:49 PM ET (US) OK, I thought from the video, that 4900 was WOT. 5500 is on the money.
jimh	posted 12-27-2013 02:54 PM ET (US) [Moved to PERFORMANCE.]
jimh	posted 12-28-2013 11:42 AM ET (US) I added some comments on the YouTube page about your presentation. (ASIDE: on YouTube you can now comment using your Google+ identity, you can edit your comments after posting them, and the person originating the posting of the video can manage the comments. These are all relatively new features on YouTube which greatly enhance the comment segment of the page.)