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#12450615 - 10/02/17 06:26 PM Yamaha Outboard Operating Range
Bob Landry Offline
Extreme Angler

Registered: 08/10/11
Posts: 2721
Loc: Austin, Tx
I found out while wrestling with props and looking for a SS one, that in 2014 Yamaha increased the operating range off the 115 300RPM, to 5300-6300.
Yamaha has performance bulletins on their site with results of their motors with specific boats so you can see how they should be propped. The one for my boat and motor was done with the older motors with the lower operating range and with a prop that is no longer available. Lot's of head scratching trying to figure out why they propped my motor the way they did and trying to get the numbers to make sense when applying them to my boat and the newer 115 Yammie.
Just wondering if they increased to operating ranges across the board or just on a few select motors.
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2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115

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#12457140 - 10/07/17 07:56 PM Re: Yamaha Outboard Operating Range [Re: Bob Landry]
Gamblinman Online   content
TFF Team Angler

Registered: 11/26/02
Posts: 3294
Loc: Yantis, TX
Refer to the operators manual, or, the info sticker on the motor itself. You should prop your boat to reach at or near it's maximum operating RPM's when normally loaded at WOT.

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#12457681 - 10/08/17 08:06 AM Re: Yamaha Outboard Operating Range [Re: Bob Landry]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1658
Loc: Euless
Slightly under propped is better than over propped. As for the rev limiter, it's your hand on the throttle control and trim switch. Over propping and lugging the motor ain't good for them, especially on hole shots.
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From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!


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