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Old 07-19-2011, 05:56 AM
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Default Prop for Yamaha F115

Andy,

I recently repowered my boat from an F90 to an F115. I was running a 13x17 black SS 3-blade prop on the F90 with good performance (WOT @ 6,000 rpms, good holeshot, etc). I kept the same prop when I repowered, but the F115 would over-rev the 13x17 easily. I just tried out my buddy's 13.5x19 SS prop (ported), but do not like the performance. With the 13.5x19, WOT is around 5,500-5,600 rpms...holeshot is not good at all. With a heavy load, it will take 6-8 seconds to plane. I will say that mid-range performance is very good with this bigger prop.

Based on a little research, I am interested in the 13.25" x 18" Yamaha Performance 3-blade prop (MAR-GYT3B-V4-18). Do you think this prop would be a good fit? If so, I'd like to get a quote if possible.

Thanks for the help!

Brandon
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Old 07-19-2011, 12:06 PM
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Thank you for your order Brandon......

Andy
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Old 08-06-2011, 08:17 AM
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Default Mar-gyt3b-v4-18

How much does that prop run? I still have the alum prop that came with the boat, curious how much better the perf is with the stainless one.
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Old 08-07-2011, 08:37 AM
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Its on our site here http://www.simyamaha.com/Yamaha_Prop...yt3b-v4-18.htm

I haven't heard back from Brandon on how this one worked out. SS props typically outperform aluminum ones.

Andy
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Old 08-09-2011, 07:47 PM
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Andy,

I really like the performance of the 13.25x18 prop. Hole shot is really good (just as good as the 13x17 SS). Mid range performance is much better, and top end speed increased about 5 mph from the 13x17. Grip during a turn is also much better.

However, WOT is only 5,600 rpms with a full load. The new prop has a lot more cup than the props I've used in the past...not sure if that reduces WOT rpms? The 13.5x19 prop I used had large ports which probably helped vent the prop & turn more rpms.

From a performance standpoint, the new prop is a good fit...but I know these F115's like to hit around 6000 rpms at WOT. Any thoughts?

Brandon
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Old 08-10-2011, 03:48 PM
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How high are you trimming it to hit 5600?

Andy
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Old 08-14-2011, 04:39 PM
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Andy, I hit 5600 rpms after I trim the motor halfway up the trim indicator (at #3 on the digital tach).
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