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Learning the HARD way...
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I'll bet that the boat currently backs like a champ. Forward, not so much.
 

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Anybody remember the old AAMCO transmission repair commercials in the 70s-80s? “Hey, boss, let me try. I always wanted to work on a transmission”
 

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My yard has an excellent Prop Shop, but, they don't touch Max Props. They sent mine back to PYI for me, it came back looking like, a Brand New Prop. ( and it worked)
 

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I sent my max prop to PYI to repair a ding in the leading edge of one blade. It came back looking new, but I still needed to assemble it and set the pitch correctly. They have a few different models. Mine requires lining up letters on the gear teeth inside the hub and it installs in pieces.
 

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I sent my max prop to PYI to repair a ding in the leading edge of one blade. It came back looking new, but I still needed to assemble it and set the pitch correctly. They have a few different models. Mine requires lining up letters on the gear teeth inside the hub and it installs in pieces.
My MaxProp is an older 3-bladed model—perhaps the “Classic”—which requires assembling a lot of loose parts on the shaft, as Minne describes. You would have to deal with this if you wanted to change the pitch. PYI does not recommend doing this in the water! (We had to reassemble our MaxProp in the water once and it took my son 90 minutes on SCUBA in shallow water that allowed him to plant his feet on the bottom. It was either that or get towed to a marina for a haul-out.)

However, IIRC, the newer MaxProps allow for an easier adjustment in the water. I can’t tell for sure, but it looks like the prop in the video is a newer model that has a much simpler adjustment process that still needs a diver, but does not require a haul-out. That said, there may be an assembly problem with the prop in the video that would not allow for an easy, in-water adjustment of forward pitch, but it wasn’t apparent from the video. What is obvious was that the yard screwed up and should have noticed this problem before launch.
 

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Ive re/re'd my older stylel 3 bl Max many times, never in the water. Only problem I ever had was the nose zinc. Two models , nearly identical, one doesn't allow full blade rotation .Good to test this before launch.
 

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1968 Columbia 50
Columbia 50
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436 Posts
The really sad thing is that the yard workers left it this way knowing it wasn't right. Once the prop is on , it is only human nature to spin it and watch how it folds, and still they left it out of pitch. I've got one of the old 3 blade classics, my daughter loves to spin it.
 

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I don't discuss my member
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Discussion Starter #11 (Edited)
PYI does not recommend doing this in the water!
This is not so. I have done many, many underwater installations and repitches of the Classic model and almost every one of those jobs has come from a PYI referral.

However, IIRC, the newer MaxProps allow for an easier adjustment in the water. I can’t tell for sure, but it looks like the prop in the video is a newer model that has a much simpler adjustment process that still needs a diver, but does not require a haul-out.
This prop is the now-discontinued Eco-wind model (I mistakenly identified it as an Easy model in the video.) It does have an external pitch adjustment feature. However, PYI has recommend that the prop be shipped to them for reassembly as they believe it was done incorrectly at the yard. That said, no Max Prop, regardless of model, requires hauling the boat for repitching.
 

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This is not so. I have done many, many underwater installations and repitches of the Classic model and almost every one of those jobs has come from a PYI referral.
I stand partially corrected. When I had a prop casualty about 18 yrs or so ago, my son disentangled a concrete block that had been winched up, ripping and dog-earring all 3 blades. In the process, he dismantled the prop and placed the parts on the dock. That’s when I called PYI for help.

PYI’s response was that they did not recommend in-water assembly, but that there were a limited number of divers nationwide that had their confidence and could be recommended to assemble/reassemble the MaxProp Classic. Fstbttms is apparently one of those divers. Unfortunately, none of them were anywhere near me.

PYI did provide the instructions for setting the pitch and my son, who is an accomplished diver, properly pitched the prop and reassembled it in about 90 minutes. Luckily, the damage was symmetrical and we were able to get to our marina without a lot of vibration at low speed. I am assuming he reused the short cotters that lock the setscrews, which would explain why it took him so long—especially as a first-timer at this.

The newer MaxProp designs seem to be far friendlier for underwater assembly than my Classic model. We’ve had our MaxProp back to PYI twice for major overhauls and I was the one the reassembled it on the hard when we got it back. I can understand why PYI did not recommend assembly in-water by an unqualified diver/mechanic.
 

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I don't discuss my member
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Discussion Starter #13
The newer MaxProp designs seem to be far friendlier for underwater assembly than my Classic model.
The newer Max Prop models do not require in-water assembly/disassembly for installation or repitching.
 

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The newer Max Prop models do not require in-water assembly/disassembly for installation or repitching.
Exactly. You can check out the instructional videos on the PYI site and see for yourself how complex the installation of a Classic model on the shaft is, compared—for example—to the Easy model. Anyone who thinks installing or even repitching the Classic model in the water (which requires partial disassembly) isn’t a nightmare hasn’t done it or looked at the 3-blade installation video: https://www.pyiinc.com/max-prop-classic.html.

Kudos to fstbttms if he has worked the Classic model multiple times in the water, but I still believe the PYI advice not to try this yourself.

BTW, PYI customer support is absolutely the best.
 

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It would have to be a serious emergency for me to ever consider working on my max prop in the water. I've done it ashore and wished I had a third hand. Some of the pins are so small, I can't imagine having the dexterity to manipulate them underwater. Let alone, with our water viz, there is no way I'd see the lettering, among all the grease, to make the proper adjustment.

If there was a diver that was good at it, this is a guaranteed hire-out job. Or a short haul.

As to the OP, my imagination has me thinking the actual mechanic that did the work had never done one before. If you follow the directions, it's not brain surgery, it's just awkward, at times. I can see the yard giving the new guy the job, who didn't have any perspective on whether they did it right or not.
 
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