Classic SeaCraft Community

Classic SeaCraft Community (http://www.classicseacraft.com/community/index.php)
-   Performance (http://www.classicseacraft.com/community/forumdisplay.php?f=5)
-   -   Anyone out there with Twin 150 Yamaha Motors? (http://www.classicseacraft.com/community/showthread.php?t=16376)

Jaizzen 02-26-2006 09:43 PM

Anyone out there with Twin 150 Yamaha Motors?
 
Looking for some perfomance data from guys running twins on their 23' Tsunami or Sceptre.

Thanks, Jason

CapeBoater1 02-27-2006 07:19 AM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
I have a 23 Grady Gulfstream with twin 150 Yamahas. The performance data on that is a cruise speed of 30-33 and top of around 47. The gulfstream has an identical deadrise at the transom and is a heavier boat so your performance would be similar I would "GUESS".

Jaizzen 02-27-2006 03:16 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
Quote:

I have a 23 Grady Gulfstream with twin 150 Yamahas. The performance data on that is a cruise speed of 30-33 and top of around 47. The gulfstream has an identical deadrise at the transom and is a heavier boat so your performance would be similar I would "GUESS".

Thanks for the input! I was hoping for a 30 kt cruise. Top end doesn't mean much to me. How about fuel numbers?

Thanks again fot the information.

peterb 02-28-2006 08:59 AM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
I have twin 1998 Yamaha 150 Salt Water Series engines. They have carb's and like gas alot. They are on a 23 foot SF SeaCraft. I may average around 1.5 miles per gallon (if I'm lucky).

Jaizzen 02-28-2006 10:36 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
Thanks for the info. I'll put my numbers up as soon as I splash the boat.

Jason

Jaizzen 03-23-2006 09:47 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
PeterB, What props you running? What type of load do you carry.

thx, Jason

peterb 03-23-2006 10:51 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
Jason,

I have stainless steel 17-M props.

For boat weight I come up with around 5,600 pounds

(boat & t top = 3000 pounds) + (2 engines = 838 pounds) + (mostly filles 150 gallon gas tank = 900 pounds) + (3 fisherman and other misc stuff = 600 pounds)

Also, I use 12x12 Bennett trim tabs

What was the question again? Hope this helps.

Jaizzen 03-23-2006 11:23 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
Thanks for answering my question. I too have the m-17 props. I have the same fuel, same motors (not installed yet). I have a Tsunami. I will be considerably heavier with scuba tanks. Just trying to see if i'll be propped right.

Jason

peterb 03-24-2006 10:10 PM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
Oh, and I get up to around 5,400 RPM's at WOT

peterb 04-23-2006 12:03 AM

Re: Anyone out there with Twin 150 Yamaha Motors?
 
So what kind of performance numbers did you end up getting?


All times are GMT -4. The time now is 06:29 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
All original content © 2003-2013 ClassicSeacraft