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| Another Prop Pitch Question.... https://www.smwebhead.com/phpBB3/viewtopic.php?f=11&t=4039 |
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| Author: | bradleyb [ Mon Jul 13, 2009 9:14 pm ] |
| Post subject: | Another Prop Pitch Question.... |
1997 225 Sundowner with a Volvo 5.7, 280hp with an SX. I damaged my 14 1/4 x 23 this passed weekend and I am looking for advice as too what pitch I should go with 19, or 21? The 23 was a real dog out of the hole and I have no need for high top end. We usually have a full tank of gas, four peeps on board, and maybe an extra 150-200lbs. I need to get a new prop ordered soon so I can have it by this weekend. Thanks in advance, Brad |
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| Author: | M3eater [ Mon Jul 13, 2009 11:13 pm ] |
| Post subject: | Re: Another Prop Pitch Question.... |
Rule of thumb is; a change of 1" of prop pitch is good for about 200 RPM change at WOT (wide Open Throttle). Do you know what your WOT was, when loaded? |
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| Author: | bradleyb [ Tue Jul 14, 2009 5:33 am ] |
| Post subject: | Re: Another Prop Pitch Question.... |
Gordon, I'm not quite sure sure what my WOT is due to my tach not working. It's rated at I believe 4800 - 5000 rpm WOT. I'm very tempted to go with a 19 since the 23 was very bad out of the hole, but I am worried about getting my R's up to high and fuel economy. The good thing with the 23 was that I was getting great fuel economy which leads me to think that I should go with a 21 to get somewhat better take-off and still enjoy the decent fuel economy. Thanks, Brad |
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| Author: | M3eater [ Tue Jul 14, 2009 7:24 am ] |
| Post subject: | Re: Another Prop Pitch Question.... |
Brad, is there any chance you can try both props? Otherwise, I would be tempted to say the 21 would be a wise choice. |
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| Author: | Graham R [ Tue Jul 14, 2009 8:13 am ] |
| Post subject: | Re: Another Prop Pitch Question.... |
Brad, The originally fitted prop would ( or rather should) have been a 14 1/2 x 21 and not a 23, according to the specs on the FW web site http://www.fourwinns.net/fastfacts/fastfact/1997/ff225Sp56-59.pdf Both my DP equipped FW boats came with the wrong props according to the data on the FW site! Graham |
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| Author: | bradleyb [ Tue Jul 14, 2009 10:54 am ] |
| Post subject: | Re: Another Prop Pitch Question.... |
Thanks everyone for the info, I ordered a 21 this morning! |
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