I have a 2017 Suzuki 20 hp . I need to replace the prop , I’m running a 9 1/4 “ x 10 “ aluminum prop.What’s your recommendation and where to go . Is there anybody local making stand up grab bars while running a tiller ?
1987 13’ Boston Whaler S.S. 40 Yamaha
You need a tachometer to check your WOT (Wide Open Throttle) RPMS before you reprop. You may already be running the right pitch for your boat? You may just need to get the same size prop but change over to stainless?
Second the need to know what wide-open-throttle RPMs you’re running. You can get a little tach off of amazon for less than $15. (https://www.amazon.com/Timorn-Replaceable-Waterproof-Tachometer-Motorcycle/dp/B0756VGDTC/ref=sr_1_1_sspa?crid=1ZEV01S17ULSB&keywords=tachometer+for+small+engines&qid=1568641653&sprefix=tachometer%2Caps%2C140&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExQkk2MVVZNUxXQlNDJmVuY3J5cHRlZElkPUEwOTcwMTUzMk9JUllRVjlHMVFPRCZlbmNyeXB0ZWRBZElkPUEwNTgxMDE5TEpWOThOSTA4S0ZPJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==) You just wrap the lead wire around a spark plug wire and it ‘sees’ the spark. Most of these little hour meter/tach gadgets will let you select 2 or 4 stroke motors config. I put that one on my Yamaha 25 and it works well enough. It wobbles about 40 rpms around some value. But, I figure on a 25hp motor plus or minus 40 is good enough.
Once you know your RPMs at WOT and your motor’s prescribed range for RPMs at WOT, then you know whether you are running a reasonable diameter and pitch for your situation.
Is there some performance issue you’re trying to address?
17’ Henry O Hornet w/ Johnson 88 spl
26’ Palmer Scott project hull
14’ Bentz-Craft w/ Yamaha 25
Normally Mike at Skip’s propeller can tell you what you need. He is great to work with.
Sea Hunt 212 Triton
“Head East”
Thanks all , no performance issues . Just a little beat up .
1987 13’ Boston Whaler S.S. 40 Yamaha