Re-Power 1972 SPORT 13 with Yamaha F25
Posted: Thu Aug 11, 2022 8:26 pm
[This discussion about the performance that will occur after a re-powering of a boat has been moved to the PERFORMANCE forum. The PERFORMANCE forum is where all such topics of boat, engine, and propeller performance are discussed--Moderator]
Q1: will a Yamaha F25 propel a 1972 SPORT 13 fast enough to get on plane with four people aboard?
Q2: with a Yamaha F25 will a 1972 SPORT 13 have a cruising speed between 13 to 25-MPH?
If any reader has a c.1972 SPORT 13 with a Yamaha F25, please comment about the boat performance.
A goal for the re-power is to have my 13-year-old daughter to be able to use it by herself and for our family of four to be able to fish from the boat, to explore with the boat, and for the boat to get on plane. We do not care about top boat speed; we just want the boat to get on plane. We will NOT be using it to pull tubes or water-skiers.
BACKSTORY
I am refurbishing a [1972--HEY--USE FOUR DIGITS FOR YEARS] SPORT 13 boat that my father gave to me when I was age 13. The boat needs to be re-powered.
The current outboard engine is a c.1980 Johnson 35-HP that's been on the transom for years. With the Johnson 35-HP, the boat speed was greater than 30-MPH.
Q1: will a Yamaha F25 propel a 1972 SPORT 13 fast enough to get on plane with four people aboard?
Q2: with a Yamaha F25 will a 1972 SPORT 13 have a cruising speed between 13 to 25-MPH?
If any reader has a c.1972 SPORT 13 with a Yamaha F25, please comment about the boat performance.
A goal for the re-power is to have my 13-year-old daughter to be able to use it by herself and for our family of four to be able to fish from the boat, to explore with the boat, and for the boat to get on plane. We do not care about top boat speed; we just want the boat to get on plane. We will NOT be using it to pull tubes or water-skiers.
BACKSTORY
I am refurbishing a [1972--HEY--USE FOUR DIGITS FOR YEARS] SPORT 13 boat that my father gave to me when I was age 13. The boat needs to be re-powered.
The current outboard engine is a c.1980 Johnson 35-HP that's been on the transom for years. With the Johnson 35-HP, the boat speed was greater than 30-MPH.