Sylvan tritoon speed

[Jcimabue]

Hi everyone,
I'm new to the forum and looking for any advice you can provide.
I recently purchased a Sylvan L5 25'-10" tritoon with a 200hp Yamaha last year. The boat has no problem getting up on plane but seems to be lacking in top end speed. With 2 adults. no gear and a full tank of fuel(60gallons) it tops out around 25 - 27mph. This seems slow compared to other posts I've read about with other boat manufacturers.
Any input would be appreciated.
Thanks, Joe

[Marc K]

Hi Joe,

Welcome!

What is your RPM when running wide open at that 25-27 MPH?
Did you trim up to try to lift the front of the nosecones up a bit?

Marc

[Jcimabue]

Running 25-27mph Wot at 5200 Rpm and trimmed up.

[Marc K]

Check to see what your wide-open RPM should be. It seems to me that it should be closer to 5800-6000. If so, you may have too much prop which will "lug" the engine down and not reach full potential. Much depends upon the diameter and design of your pontoons and weight distribution front-to-back.

Yes, I would think that 30-35 MPH would be reasonable, but that would depend upon whether you can lift the nose cones up on the surface of the water. With my 25' two-tube boat and 115 HP, I cannot so you see my bow wake and laugh!

[jadeboy]

seems slow I can run that with my 22 Sylvan 2 log and a 115 Merc.

[steve1313]

Yes, if you're only running WOT at 5200 RPM, you've got a mismatched prop. That Yamaha should be at about 6000 +- at WOT. As a comparison, I have a Yamaha 150 on a 23' tritoon and run at 6000 WOT and can touch 40 MPH GPS speed.