Ed - I saw your post in the last one, but I figured I would post it for everyone else. The new 225's are available in 30".
I'm not sure how bay manufacturing 5" extensions impact the warranties on the 150's (not that you'll need to warranty anything).
FWIW - I cruise at 4500rpm most of the time and that seems to be the happy place for my 150. Also he could gain a few MPH (200-300rpm) by running enertias rather than mirage's.
https://www.thehulltruth.com/parts-f...arranty-2.html
Quote:
Originally Posted by littlemagilla
Get'n Busy
I am very happy with the performance. I am re powering with the same engines
I see 2 Plus at every speed and if you go to moderate cruise 27 or 28 you can push 3mpg
Hre are some numbers that coores posted on a boat he redid in Key west. I am running 19's and see plus minus the same numbers. Hence why I never went to 18's. We usually top out at 5200 or 5300 trimmed out but I don't run those speeds and that's basically the difference between the two props in my eyes
2 guys, maybe 100 gallons of fuel, maybe 10 gallons of water, SE wind at maybe 12-15mph, 18" Mirage props, engines with 7.5 hours on them ---
3000rpm
27mph
8.6gph
downwind
5500rpm WOT
45mph
28.4gph
downwind
4000rpm
34mph
12.2gph
downwind
4000rpm
33mph
14.5gph
into the wind
Notice that the cruise at 4000rpm and 33-34mph produces economy in the 2.3-2.8mpg range. And a 27mph cruise gives just over 3mpg.
It's extremely impressive
I will add that If you aren't concerned with going 50mph then these engines at cruise are hard to beat
Thanks Greg
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