Prop selection for 99 353 HP500 w/boxes?
#1
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Prop selection for 99 353 HP500 w/boxes?
I think the boat currently has the original merc 4 blade in 30P. I'd like to turn these into spares. Any prop suggestions for improvement without breaking the bank? Thanks.
#2
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I'd go with a set of labbed 28 5 blade Maximus. 15 1/4" diameter, with a little work, 5200 rpm's.
Dave
Dave
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#3
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I read that these would create more stern lift. I'm no expert on this but wouldn't this push the bow down on the 353 who bow runs a little low already? How about the Hydromotive P5X? Some people claim they run as good out of the box without the expense of labbing the Maximus. Just trying to avoid a $2k experiment!
#5
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Did they actually make 15 1/4 and 15 5/8?
What boat / motors were you running them on?
Have they ever been repaired or reworked and why are you selling?
What boat / motors were you running them on?
Have they ever been repaired or reworked and why are you selling?
Last edited by Joe308; 05-31-2010 at 12:19 PM.
#6
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Snoboard - your PM box is full. Anyway, there are some nice programs out there now where they're offering demo's for a $40 turnaround fee. Merc racing prices are a bit high on the Maximus - you can get these from Mertinemarine.com for about $1080 each. I think I'm going to have my 4 blades tweaked to see what that does to the top end.
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Thanks, I had an older Wellcraft hull like the 311 and it was bow high most of the time, never had a chance to throw cleavers on. The 353 stepped hull behaves a bit different than the std. deep V's - I may try a little work on the 4 blades before going to the 5's.
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I never anticipated this much trouble dialing in my new setup. This year I have tried 30P Bravo 4 @ 5500 rpm 28P Bravo 4 @ 5700 rpm and 27P Mirage 3 @ 5850 rpm. I cant ring out more than 82 in salt water. It makes no sense considering we have a combined increase of 80 more cubic inches 186 tq and 270 hp on the dyno vs the original hp 500s but only picked up 3 mph. The new motors peak tq at 4800 and hp at 5800 vs the hp500s which maxed tq at 4300 and hp at 5300. I spoke to Brad at BBlades but we are all over the place with recommendations. He was thinking of having me try 5 blades but the bow seems to carrying to low already with the 4 blades. I wish there were some good shops left in NJ that did prop dialins and rigging.