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| 180 4-blade https://www.smwebhead.com/phpBB3/viewtopic.php?f=11&t=3519 |
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| Author: | scokat916 [ Sun May 17, 2009 9:25 am ] |
| Post subject: | 180 4-blade |
Is anyone running a 4-blade prop on a 180 Horizon? I currently have a 3-blade 14x19 SS turning the 4600 RPM at WOT on a 5.0GL. I'm looking for more hole shot and looking at a 14.25 x 19 4-blade aluminum. |
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| Author: | ht32bsx115 [ Sun May 17, 2009 5:50 pm ] |
| Post subject: | Re: 180 4-blade |
Howdy, You're just going to have to try it. Since you're only turning 4600, your engine probably has a max WOT RPM of 4800. (you need to verify this) You could probably get a better hole shot by going to a 3 blade (cupped) 17p stainless prop and up your WOT RPM to around 4800 4 blade props are usually even number pitch also, so you could also get an 18p 4 blade.... I'm guessing that you have a late model boat? You could probably even put a Duo-prop lower on it and probably get really good all around performance. Make sure your tach is accurate though. Generally speaking, you should "prop" your engine/drive to give you maximum rpm at WOT when the boat is loaded at where you always operate(weight + fuel, etc) and at the elevation (MSL) you typically use the boat. Regards, Rick |
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| Author: | robbo3 [ Sun May 17, 2009 6:58 pm ] |
| Post subject: | Re: 180 4-blade |
I use a 14x20 4-blade on my 4.3 V-6. The stock prop is a 14.25x23, and the 4-blade seems to be better for slower planing, quicker holeshot, and eliminating wandering at idle speeds. |
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