15-footer with 25-HP

Optimizing the performance of Boston Whaler boats
Marinevest
Posts: 1
Joined: Tue Aug 25, 2020 4:18 pm

15-footer with 25-HP

Postby Marinevest » Tue Aug 25, 2020 4:25 pm

Is a 25-HP engine enough to power for a 1988 15-footer [of undesignated model] carrying two adults and two grandchildren under 10-years-old?

I do not need to go 35-MPH.

BACKSTORY: I have a 1988 15-footer with a 1988 Mariner 60-HP engine in outstanding shape and never had a problem. But considering the age of the engine, I would like to buy a new engine. I have limited funds and can only afford a 25-HP.

[Moderator's note: Thread moved to PERFORMANCE because the thread seeks advice on the performance of a Boston Whaler boat.]

biggiefl
Posts: 897
Joined: Thu Jul 11, 2019 1:31 pm
Location: south Tampa Bay area
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Re: 15 ft whaler

Postby biggiefl » Tue Aug 25, 2020 9:09 pm

Not going to happen. 35mph is a minimum of 50hp. A 25 might fetch you 25mph or so with just solo. Find a nice used 60hp 4 stroke.

Keep your outstanding 60hp and start saving.
On my 24th Whaler. Currently in the stable: 86 18' Outrage, 81 13' Sport(original owner), 87 11' Sport, 69 Squall(for sale cheap).

MarkCz
Posts: 131
Joined: Sat Jan 27, 2018 3:44 pm

Re: 15-footer with 25-HP

Postby MarkCz » Fri Aug 28, 2020 6:56 pm

I have an older 1987 Mercury 70 hp 2 stroke power cycle engine that runs great. Besides the noise at idle and maybe higher fuel burn compared to modern engines the cost is perfect for me. Free, I already own it.