TinBoats.net
The original aluminum boat site!
Forums
New posts
Search forums
Blog
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Boats
Motors
15 OR 20 HP.... IS THERE MUCH DIFFERENCE?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support TinBoats.net:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="randyo3629" data-source="post: 427445" data-attributes="member: 21834"><p>been looking at new Tohatsu 15 & 20 hp tiller outboards. the brochure shows the internal engine specs to be identical... as in displacement. the gear ratio is the same. prop selection size is the same @ 6"-11.5"</p><p>the only difference is see is in the Max RPM range. 5000-6000 on the 15 hp and 5400-6100 on the 20 hp.</p><p>how could the additional 100 RPM make 5 hp difference?</p><p> what do they do to get the extra 5 hp?</p><p></p><p>seems to me that with the engines being basically identical, you make up for a difference in top speed with change in propeller pitch.</p><p>i also looked at the specs for their 8 & 9.8 hps motors....they are identical in every way.</p><p></p><p>this will be my first new engine. do you get to pick the pitch of the propeller? why the large range in prop sizes?</p><p>all else being equal, is it worth the extra $$ for 5 hp?</p><p>thanks.</p></blockquote><p></p>
[QUOTE="randyo3629, post: 427445, member: 21834"] been looking at new Tohatsu 15 & 20 hp tiller outboards. the brochure shows the internal engine specs to be identical... as in displacement. the gear ratio is the same. prop selection size is the same @ 6"-11.5" the only difference is see is in the Max RPM range. 5000-6000 on the 15 hp and 5400-6100 on the 20 hp. how could the additional 100 RPM make 5 hp difference? what do they do to get the extra 5 hp? seems to me that with the engines being basically identical, you make up for a difference in top speed with change in propeller pitch. i also looked at the specs for their 8 & 9.8 hps motors....they are identical in every way. this will be my first new engine. do you get to pick the pitch of the propeller? why the large range in prop sizes? all else being equal, is it worth the extra $$ for 5 hp? thanks. [/QUOTE]
Verification
Post reply
Forums
Boats
Motors
15 OR 20 HP.... IS THERE MUCH DIFFERENCE?
Top