Prop 12x13 or 13x13?

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   So you had a 13x12 and not a 12x13?  Big difference!

Acmes tend to have a good bit of aft rake in their props, so you'll have more clearance with a 13" diameter Acme than the original 13" diameter Federal.

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TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21186	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Topic: Prop 12x13 or 13x13? Posted: April-12-2012 at 5:03pm
	So you had a 13x12 and not a 12x13? Big difference! Acmes tend to have a good bit of aft rake in their props, so you'll have more clearance with a 13" diameter Acme than the original 13" diameter Federal.

must_dash Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: August-27-2011 Location: Lake Maggiore, Status: Offline Points: 223	Post Options Post Reply Quote must_dash Report Post Thanks(0) Quote Reply Posted: April-12-2012 at 4:53pm
	I have the 13x12 on at the moment. A 13" gives about 3/4" clearance, but there is some 'burn' damage on the hull. A 13x11.5 will certainly give better hole performance.
	1986 Martinique - sold When we ask for advice, we are usually looking for an accomplice.

daddyo Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: September-09-2008 Location: Austin, TX Status: Offline Points: 114	Post Options Post Reply Quote daddyo Report Post Thanks(0) Quote Reply Posted: April-12-2012 at 3:27pm
	I'm guessing you've got a 13x12, as that's what I have and it's probably oem. General consensus is that the acme 542 is the way to go. The 542 is 13x11.5. At least one has gone the next size down, i think it was a 13x10.5. I plan on making the switch to the 542 in the not too distant future. Just double check what you have and make sure you've got the clearance for it.

TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21186	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Posted: April-11-2012 at 3:50pm
	On such a large boat, you could use the extra diameter of a 13x13. I would guess that something with a little less pitch would be ideal for such a big boat though... 13x12 or 13x11.5.

must_dash Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: August-27-2011 Location: Lake Maggiore, Status: Offline Points: 223	Post Options Post Reply Quote must_dash Report Post Thanks(0) Quote Reply Posted: April-11-2012 at 3:48pm
	I have an '86 Martinique with a 351W in it. The boat is also LPG/propane converted which adds at least a 100lb of weight to the stern for the steel tanks, along with 25yrs worth of soaked foam (yep it's there...) Propane also looses you about 10% power. Used for skiing, tubes, wakeboards, tubes and running around in. On a 12x13 max rpm in a light boat gave about 40mph. I have two props: a 12x13 and a 13x13 what is the general consensus as to what would be best? In Italy we just hit $9.63 a gallon for gas while LPG/Propane is only $4.08. So a huge saving on the fuel bill. Tom
	1986 Martinique - sold When we ask for advice, we are usually looking for an accomplice.

Prop 12x13 or 13x13?

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