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Prop selector

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muddywaders
Posts: 95
6

Prop selector

Post by muddywaders »

Currently running a 14x60 flat bottomed welded boat with a 1990 2-stroke 20hp merc.The hull weighs around 450lbs and usually carries two guys 5 gallons gas and 50-100lbs gear/beer.My last two props have been 10 3/8x13p alum. (Mercury brand) that have provided good overall perfomance only struggling with 3 guys.The Mercury prop caculator does not seem to work with my parameters.I am considering a 10 5/8 x 12p and wondering how much speed I will lose or if I will be over-revving when alone in the boat.Also want to upgrade to 25hp carb.Any suggestions?

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DaleH
Donor
Posts: 2389
5
Location: Eastern Mass

Prop selector

Post by DaleH »

muddywaders wrote:The Mercury prop caculator does not seem to work with my parameters.
Did you try the one by Turning Point Propellers that is listed as a 'sticky' post under the Motors forum?
#1) 1st tin rebuild, 18' Lund http://forum.tinboats.net/viewtopic.php?f=21&t=36583
#2) 25' Parker refurb from EMPTY hull http://www.classicparker.com/phpBB3/vie ... p?f=15&t=6
#3) 16' V-tin rebuild http://forum.tinboats.net/viewtopic.php?f=21&t=36465
#4 Procraft SV14
#5) 16' Starcraft entirely NEW Transom Skins http://forum.tinboats.net/viewtopic.php?f=3&t=37548

nowgrn4
Posts: 209
4
Location: Florida

Prop selector

Post by nowgrn4 »

Without knowing your current WOT RPM with your average load out any suggestion is a shot in the dark.
17' Pro-Line 115HP DI Johnrude Bay rig
1652 Weld-Craft 50HP Johnrude fish camp rig
17' Grumman canoe 3.3HP Johnrude on side mount creek runner

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