Brownie289
Contributing Member
What should I be seeing for RPMs at WOT?
How often should I run that ?
Thanks!
Late 80s 454s
How often should I run that ?
Thanks!
Late 80s 454s
MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
What should I be seeing for RPM at WOT?
How often should I run that ?
Late 80s 454s
I have an '89, and have been told by many that full throttle should be only rarely used, if you want your engine to last. I however used it to determine whether my engines, boat and prop were matched, as conventional wisdom has it that both engines should match rpm wise, and should be in the vicinity of 4000 rpm.
Thanks guys, it’s an older boat and of course I don’t want to push it. I got about 3800-3900 rpm.
I'm unclear as to whether your 3,800-3,900 RPM is your WOT RPM, or if it's your cruising RPM.
I believe that your WOT RPM should be closer to 4,600.
It also doesn’t have original props either.
As per srfdude below, I agree...... you may be over-propped.
Engines should run a little faster, but could be the props were changed higher pitch, dirty bottom, engines old. After rebuild mine are peaking at 4150/4200, and I am quite satisfied.
I'll go a bit further and suggest that many production boats aren't optimally propped when they leave the factory/dealer. Typically, the owner starts adding gear and other improvements and loading the tanks to full capacity and the engine won't make recommended WOT RPM....