19' Outrage II Re-power Yamaha XB115

Optimizing the performance of Boston Whaler boats
hesse3
Posts: 1
Joined: Wed Jul 08, 2020 6:27 pm

19' Outrage II Re-power Yamaha XB115

Postby hesse3 » Wed Jul 08, 2020 6:31 pm

I just re-powered my 1995 19 Outrage II with a Yamaha XB 115 four-stroke-power-cycle engine manufactured in 2019.

The 19 OUTRAGE II boat reaches plane in four seconds and has a top speed of 40-MPH at engine speed of 5900-RPM; data taken with 70 gallons of fuel aboard. I am very happy.

jimh
Posts: 11672
Joined: Fri Oct 09, 2015 12:25 pm
Location: Michigan, Lower Peninsula
Contact:

Re: 19' Outrage II Re-power

Postby jimh » Fri Jul 10, 2020 11:25 am

The top boat speed of 40-MPH seems very good for a 115-HP rated engine. I have seen 19 OUTRAGE II boats with older Yamaha V6 150-HP engines; I don’t think they were all that much faster.

What does the “XB” model designation mean?

What is the engine weight?

User avatar
Phil T
Posts: 2602
Joined: Thu Oct 22, 2015 6:08 pm
Location: Was Maine. Temporarily Kentucky

Re: 19' Outrage II Re-power Yamaha XB115

Postby Phil T » Fri Jul 10, 2020 12:41 pm

Please also post the propeller make/model and size and the mounting height of the engine.
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003

biggiefl
Posts: 897
Joined: Thu Jul 11, 2019 1:31 pm
Location: south Tampa Bay area
Contact:

Re: 19' Outrage II Re-power Yamaha XB115

Postby biggiefl » Fri Jul 10, 2020 1:04 pm

My 1986 18' outrage with a F115 with 13x17 painted Yamaha SS prop will hit 40-41 around 5900-6k with bimini up and a lot of fuel mounted all the way up. I do have (very old & faded) bottom paint and 2 batteries in the stern. Pretty good for your boat which weighs more.
On my 24th Whaler. Currently in the stable: 86 18' Outrage, 81 13' Sport(original owner), 87 11' Sport, 69 Squall(for sale cheap).

User avatar
Phil T
Posts: 2602
Joined: Thu Oct 22, 2015 6:08 pm
Location: Was Maine. Temporarily Kentucky

Re: 19' Outrage II Re-power Yamaha XB115

Postby Phil T » Fri Jul 10, 2020 1:20 pm

The recently redesigned F115 reduced its weight from 402 lbs dry weight to 386 lbs. These are long shaft specs.
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003

User avatar
Phil T
Posts: 2602
Joined: Thu Oct 22, 2015 6:08 pm
Location: Was Maine. Temporarily Kentucky

Re: 19' Outrage II Re-power Yamaha XB115

Postby Phil T » Fri Jul 10, 2020 1:22 pm

In posting the weights I note the WOT range on the recently redesigned F115 is 5300-6300.

I think there is a little more room for improvement for Hesse if he is interested.
1992 Outrage 17
2019 E-TEC 90
2018 LoadRite 18280096VT
Member since 2003

biggiefl
Posts: 897
Joined: Thu Jul 11, 2019 1:31 pm
Location: south Tampa Bay area
Contact:

Re: 19' Outrage II Re-power Yamaha XB115

Postby biggiefl » Mon Jul 13, 2020 12:07 pm

With 70 gallons of fuel and hitting 40-MPH at 5900-RPM, I would leave it alone.
On my 24th Whaler. Currently in the stable: 86 18' Outrage, 81 13' Sport(original owner), 87 11' Sport, 69 Squall(for sale cheap).