1860 prop? (60 yam)

[shoooooots]

1860 mod vee alumacraft welded, 625lbs, with a 60hp yamaha 2-stroke...thinking 17 pitch? no jack plate, bob's said no when i tried to buy one, go figure, good guys for sure

[shoooooots]

hmm

[BRR]

Trophy sport prop

[Goin Coastal]

Just throwing darts at the wall without a Tach reading.

[shoooooots]

true, but i have no prop to give a tach reading on. looking for the ole educated guess on which prop to start with

guy who had the motor before me ran a 17p...he had a 13' whaler though...

[Phone Man]

Id start with a 15 of some sort.

[failed@usc]

Id start with a 15 of some sort.

I agree. I'd start with something like a 11.5 in X 15 pitch.

[Gone South]

Just throwing darts at the wall without a Tach reading.

Yup

[tman]

I agree. I'd start with something like a 11.5 in X 15 pitch.

I think the 60 uses a K Series prop, not an 11.5" prop?

If it does ive got a 15p aluminum prop that can be tried to get a baseline if you're close by

[camotoon60]

I had an 1860 crestliner cc aluminum with a 70 hp yammy 2 stroke and ran a 17p yamaha stainless. Ran good. Mid 30s

[willyworm]

I think the 60 uses a K Series prop, not an 11.5" prop?

If it does ive got a 15p aluminum prop that can be tried to get a baseline if you're close by

Yup, 4.25" gear case with 15 splines. K series is the correct prop for that motor.

Sent from my SM-G930V using Tapatalk

[willyworm]

Keep in mind, if a 17pitch 3 blade ran well and you went to a 4 blade you'll probably need to go down to a 15 or 16 pitch. The 4 blade will be a tad slower but more fuel efficient due to reduced slip. Mine grips in the turns better with the 4 blade, and speed is not a huge deal so I pretty much run the 4 blade all the time now.

[shoooooots]

from the 1860 jack plate? (60 yam) discussion:

3rd hole down on the transom bracket with the Bob's MJ5 jack plate all the way down for the maiden voyage & she ran great, 36mph with 24 gal of fuel, a buddy, my dog, and the livewell full. that into a headwind of a solid 12mph over chop

the tach is only reading like 1800-1900 @ WOT, but accurate @ idle, so thinking it's probably set on 1 cylinder mode & that my real WOT is more like 5400??

plenty of holeshot, the prop wants to blow out when i trim it all the way up, it's a stainless stiletto 13x17, very round blades, not at all shaped like a semi-cleaver prop...thinking with the jackplate i'd see better performance a semi-cleaver?? obviously fix tach first for accurate WOT RPM reading

all advice appreciated, will run again tonight hopefully with properly functioning tach & report back

[shoooooots]

5100 with the 17p

5700 with a 15p (additional info in the jack plate thread here: http://scducks.com/forum/showthread.php?t=162643&page=2)