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
Yamaha 25hp 14ft semi-V rpm range question
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="airshot" data-source="post: 513715" data-attributes="member: 1183"><p>You might try trimming the motor or change your load position, sounds like you not up on as high of plane at the lower rpm. On small boats people often need to shift things around to get proper balance and often need to have their guests sit in a spot they may not like, but needed to balance the load. A 25 hp on a 14' tinnie should have no problem at all being up on plane at 4-4400 rpm if your load is balanced properly. The faster your boat gets up on plane at the lowest rpm (75% throttle) the less fuel your motor will use. Today's engines are made to run wot for long periods of time, but many of us old timers understand that pushing any engine to extreme will shorten its life. My max rpm is 5500 on my motor, I prop it to run 5600 with minimum weight, so when I have extra weight or people it will run in the proper range. I do watch my tach when alone, on long rides I hold my rpm to around 48-5000 to be safe, on really long cruises down to 44-4600. Not that much loss of speed to help the engine last longer in my opinuon.</p></blockquote><p></p>
[QUOTE="airshot, post: 513715, member: 1183"] You might try trimming the motor or change your load position, sounds like you not up on as high of plane at the lower rpm. On small boats people often need to shift things around to get proper balance and often need to have their guests sit in a spot they may not like, but needed to balance the load. A 25 hp on a 14' tinnie should have no problem at all being up on plane at 4-4400 rpm if your load is balanced properly. The faster your boat gets up on plane at the lowest rpm (75% throttle) the less fuel your motor will use. Today's engines are made to run wot for long periods of time, but many of us old timers understand that pushing any engine to extreme will shorten its life. My max rpm is 5500 on my motor, I prop it to run 5600 with minimum weight, so when I have extra weight or people it will run in the proper range. I do watch my tach when alone, on long rides I hold my rpm to around 48-5000 to be safe, on really long cruises down to 44-4600. Not that much loss of speed to help the engine last longer in my opinuon. [/QUOTE]
Verification
Post reply
Forums
Boats
Motors
Yamaha 25hp 14ft semi-V rpm range question
Top