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I've got an '86 Johnson 60 fiberglass fish/ski boat. Prop is 13 1/4 x 17" pitch. WOT is 35mph 5600 rpm. Can anyone give me a top speed guestimate and RPM on switching to 19" pitch?
Also. Rarely I've got 4 adults in the boat but it runs like a slug when I do. Will 19 pitch prop help or make it worse when fully loaded?
Thanks!
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Thread: Prop pitch question
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August 8th, 2011, 11:13 AM #1[OP]Seaman
- Join Date
- Jul 2011
- Location
- Toronto, Ontario
- Posts
- 58
Prop pitch question
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August 8th, 2011, 11:39 AM #2Senior Chief Petty Officer
- Join Date
- Sep 2008
- Location
- Ottawa, Ontario
- Posts
- 654
Re: Prop pitch question
19 pitch will not work. Going to lose rpm and hole shot. 35 mph sounds right on the money for a 60 hp on a 4 seater glass boat.
"Doris", 2007 Stanley Islander 19, Yamaha F150
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August 8th, 2011, 11:54 AM #3Captain
- Join Date
- Aug 2009
- Location
- Savannh Georgia
- Posts
- 3,273
Re: Prop pitch question
yep you got all your gonna get with that motor..get a 70 or 115 if you want to go faster
Free ignition troubleshooting guide http://issuu.com/cdielectronics/docs...owFlipBtn=true
You will need a DVA adapter http://www.usatoolwarehouse.com/usat...e/ESI-640.html First test compression, Second test spark with a spark gap tester set a 7/16 gap, Third check timing, next CLEAN your carbs properly,
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August 8th, 2011, 12:37 PM #4[OP]Seaman
- Join Date
- Jul 2011
- Location
- Toronto, Ontario
- Posts
- 58
Re: Prop pitch question
Thanks guys.
I was thinking of modding it. Drilling holes for the exhaust to make up for the lack of holeshot performance.
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August 8th, 2011, 05:16 PM #5Captain
- Join Date
- Aug 2009
- Location
- Savannh Georgia
- Posts
- 3,273
Re: Prop pitch question
a set of trim tabs will help bunches on your hole shot.
Free ignition troubleshooting guide http://issuu.com/cdielectronics/docs...owFlipBtn=true
You will need a DVA adapter http://www.usatoolwarehouse.com/usat...e/ESI-640.html First test compression, Second test spark with a spark gap tester set a 7/16 gap, Third check timing, next CLEAN your carbs properly,
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