Yes another prop question.
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Yes another prop question.
I bought a new Turning Point prop a month ago and it was a 13 3/4 x15. Wot rpm at that time 5400 which was in my range (5000-5500) Now I am at 4900-5000. I haven't hit anything. So why could this be happening?? Also This is driving along with the same load or even pulling a tube. I am lost.
2000 Fisher 200 dlx 20'
2001 Mercury 90hp 2 stroke
2001 Mercury 90hp 2 stroke
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Re: Yes another prop question.
Only two things I can think of, your either loosing compression, or a blade is bent. Even the SLIGHTEST bend can possibly make a difference sometimes.
Custom 89 24' Procraft Funchaser Tri-toon
1985 Johnson 175 gas guzzler
2007 2500HD Duramax Z71
1985 Johnson 175 gas guzzler
2007 2500HD Duramax Z71
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Re: Yes another prop question.
I didn't see any bends today when I checked. And it is getting worst everytime I go out. This could cost me some $$$.
2000 Fisher 200 dlx 20'
2001 Mercury 90hp 2 stroke
2001 Mercury 90hp 2 stroke
Re: Yes another prop question.
I kind of noticed somthing along the same lines today. New prop on my boat at the beginning of the season... was turning 6000 to 6100 rpms. Today I noticed that at wot I was maxing out at 5800 rpm's. Now there were 4 people on the boat instead of just two... could that make a difference, how about the lake being alittle more choppy than the time before? I'm fine with it turning 5800 since yamaha recommends 6000 max for my motor, just curious as to what could reduce me 200 rpm's or so within a month....CaptainBob wrote:I bought a new Turning Point prop a month ago and it was a 13 3/4 x15. Wot rpm at that time 5400 which was in my range (5000-5500) Now I am at 4900-5000. I haven't hit anything. So why could this be happening?? Also This is driving along with the same load or even pulling a tube. I am lost.
Roland & Jo
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
Re: Yes another prop question.
Heavier loads will drop your rpm. As far as dropping 500 RPM, I would do a compression test on your motor. Something is not right and I doubt it is the prop.
Rick
2008 JC Neptoon 25TT
115hp Honda 4-stroke
2007 Suburban LTZ
Lake Murray, SC
2008 JC Neptoon 25TT
115hp Honda 4-stroke
2007 Suburban LTZ
Lake Murray, SC
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- Location: Elgin SC
Re: Yes another prop question.
One other thing can dirty toons affect it since I wet slip??
2000 Fisher 200 dlx 20'
2001 Mercury 90hp 2 stroke
2001 Mercury 90hp 2 stroke
Re: Yes another prop question.
Check the tach and make sure something has not happened to it.
2009 Tracker Fishing Barge 21 /NV logs/90 Merc 4 stroke
2007 GMC Sierra
Toledo Bend Reservoir Louisiana (mostly)
2007 GMC Sierra
Toledo Bend Reservoir Louisiana (mostly)
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Re: Yes another prop question.
If you have things growing under the waterline on your toons it will definitely affect your rpm and speed. The same goes for V hull boats.CaptainBob wrote:One other thing can dirty toons affect it since I wet slip??
Cruising the salt waters of East Florida.
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Re: Yes another prop question.
margaritaman wrote:If you have things growing under the waterline on your toons it will definitely affect your rpm and speed. The same goes for V hull boats.CaptainBob wrote:One other thing can dirty toons affect it since I wet slip??
What can I do to the toons to keep stuff from growing on them?
2000 Fisher 200 dlx 20'
2001 Mercury 90hp 2 stroke
2001 Mercury 90hp 2 stroke
Re: Yes another prop question.
You wouldn't notice this change in one outing. If you leave the dock with dirty toons you should see the same performance issues then.
as far as keeping them clean, pressure wash them regularly and you should be fine unless they already have allot of build up.
as far as keeping them clean, pressure wash them regularly and you should be fine unless they already have allot of build up.
Rick
2008 JC Neptoon 25TT
115hp Honda 4-stroke
2007 Suburban LTZ
Lake Murray, SC
2008 JC Neptoon 25TT
115hp Honda 4-stroke
2007 Suburban LTZ
Lake Murray, SC
Re: Yes another prop question.
Besides dirty pontoons which will cut into your performance there are a few other things that can cause a loss of performance. On my boat the switch from ethanol free fuel to ethanol cost me 200 rpm's off the top. Another thing it done was effectively clean the fuel system displacing it to the fuel filters which then also needed purged and replaced. Your boat is getting enough age to it maybe go over the basics first which wouldn't really heart to do anyway.
First pull all the spark-plugs and inspect them for firing, carboned up, excessive gap, etc. and replace or re-gap as necessary.
Take a look at and or replace all the fuel filters.
Also check the fuel lines and verify they are both unobstructed and in sound condition. Due to ethanol some fuel lines are failing and separating in the cores and effectively blocking fuel flow to the motor.
Once you've verified and checked for function all the basically maintenance items it may then be the time to "dig deeper into your problem".
First pull all the spark-plugs and inspect them for firing, carboned up, excessive gap, etc. and replace or re-gap as necessary.
Take a look at and or replace all the fuel filters.
Also check the fuel lines and verify they are both unobstructed and in sound condition. Due to ethanol some fuel lines are failing and separating in the cores and effectively blocking fuel flow to the motor.
Once you've verified and checked for function all the basically maintenance items it may then be the time to "dig deeper into your problem".
Respect Our Recreational Resources
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha
Leaving Only "The Footprints of Your Passing"
Boating the Muskingum River
1972 35' Crest Pontoon Houseboat
2007 90 hp. Yamaha