175 hp Yamaha ideal rpm

[Blazman234]

I have a 2015 2120sc with a 175hp Yamaha and I can't find anywhere a performance report with ideal running rpms. Any one out there have one and any advice?

 

[Brent]

Is it a 2 stroke or 4 stroke?

read this\
http://yamahaoutboards.com/sites/defaul ... 46.tmp.pdf

from

http://yamahaoutboards.com/owner-resour ... -bulletins

 

[Blazman234]

4 stroke

 

[Brent]

I would email Eric at Parker and Yamaha should have data just has not been posted or I cant find it

 

[Brent]

Here are bulletins from Yamaha Canada site. Alas none for your boat

http://www.yamaha-motor.ca/power_soluti ... rmance.php

I estimate 3400 -3500 for best mpg

Maybe contact Andy at SIM. He might know

 

[Blazman234]

Thanks

 

[sydngoose]

Ideal running RPM's and performance is an individual process: different for each hull, motor, trim tab, sea conditions/ motor mounting hole height. You will learn to "hear" what is best for your yamahas. Also, use your fuel flow meter to "dial in" her performance. While running her, play with the trim/ tilt/ negative trim of the motor while underway AND the trim tabs and the throttle. Find her sweet spot. It will vary based on sea conditions.
I can tell you that my previous Parker 2120 w/ an f150 ran best at 4400 rpm's buring 2.8-3.2mpg, running 26-27 knots but again, that varies even as subtle as full vs. empty livewell (mine was 43 gallons so 345 pounds full).
There is NO RIGHT OR WRONG ANSWER, but rather what your package likes/ performace best. Again, use your fuel flow to determine what she likes best...
Hope this helps.

 

[Brent]

That is exactly right. My best mpg is 4200 - 4400 but the sweet spot or what the boat wants to cruise to 4400 - 4600

My max rpm is 5800 rpm for 2002 F225 OB (6000 max)

 

[lklandpier]

It will be interesting to see over time if this new 175hp Yamaha is as bullet proof as the 150 has been.

Cheers

 

[Brent]

On edit best mpg at 3400 rpm

Sent from my SM-N900V using Tapatalk

 

[Blazman234]

After 30 hrs of use mostly running in LI sound I have found the boat really likes the 4500 rpm range which is 30 mph on GPS. I find at that speed I don't have to use the trim tabs to keep the ride smoother