RPMs For a Yamaha 225 4 stroke - The Hull Truth

m4cade · 09-27-2006, 10:51 PM

I am running about 5800 RPMs in my boat and I was told that might be to high for a 4 stroke. I have a 19 pitch prop and I like to run wide open. The motor in not screaming when I am running. I would like to know if that is ok are do I need an 21 pitch prop? dose anybody know about this?

Glen E · 09-27-2006, 10:57 PM

what is the mfr recommended WOT range?

kmac · 09-27-2006, 11:13 PM

6000 is the top and it will limit at 6100 so you're well within the range. Most people like to be near the top of the range so I wouldn't go with a 21 I think you're about right with the 19

acendhole · 09-28-2006, 07:59 AM

Sounds like your set-up is perfect.

JiminGA · 09-28-2006, 09:31 AM

Ours runs about 5800 loaded up with gas, folks, ice & gear... and goes to 6000 if lightly loaded.. sounds like you're ok. Max rec. RPM is 6000.

jcd15 · 09-28-2006, 09:33 AM

Your numbers are right on .You don't want to big of a pitch this will make the motor work harder.
YOu should always try to get to peak rpm's at wot.

m4cade · 09-28-2006, 09:56 AM

Thanks for the info

jyasaki · 09-28-2006, 01:12 PM

Future reference: You can view the owners manuals for Yamaha motors at

http://www.yamaha-motor.com/outboard...d_manuals.aspx

jky

FireFly · 09-28-2006, 03:26 PM

I ran mine to 6100 for about 10 seconds yesterday. Normally keep her at 4100 or so when fast cruising.

Elusive · 09-28-2006, 08:57 PM

Quote:

m4cade - 9/27/2006 9:51 PM

I like to run wide open.

Start looking at 2 stroke motors for your re-power

Themis Sal · 09-28-2006, 09:38 PM

Sounds about right. 5900 rpm's on my F250. It is within the range. But I agree, I wouldn't make a habit of long periods there on the curve.