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-   -   Autoprop Propeller - Help ! (https://www.cruisersforum.com/forums/f114/autoprop-propeller-help-49948.html)

iris 12-11-2010 23:46

Autoprop Propeller - Help !
 
Hai evert budy,
I am an Hanse boat owner, with an Autoprop propelor that was instoled 2 years ago.
Up till now it was great. But some thing hapened and the boat is not roning any more even in haigh motor RPM.
We checed the geer and the trotel system and they were fin.
We took a simpler 3 blade propelor and we chenged betweem them, and for our suprise, the bout is runing.
Our propelor is for SD,
There is a ring that was attached to the propelor in the place of the conection to the SD that was toren from the pins that it was conecceted to. We suspect this is the reson the propelor doesn't work.
Does any one has the expirient with this kind of probelm?
What is the role of the ring?
And how does it effect the propelor function?

I am sorry for my spleling mistak (Israeli)/
Iris

delmarrey 13-11-2010 00:55

Which model do you have? And is the pin you mentioned in this picture?

https://www.fotolode.com/images/fstbttms/autoproph5.jpg

delmarrey 13-11-2010 01:03

Or in this picture?

https://208.76.80.121/%7Eabmarine/fil...sd.preview.jpg

iris 13-11-2010 01:24

Our propelor is like the second pic. (the diagram)
The two parts that has been seperated are: the HSDRP plate/or ring from the propelor's body.

delmarrey 13-11-2010 10:33

I'm not familiar with auto prop and how it attaches but the ring in question does look like a separate piece. I would suggest you take it to a local dealer and have them look at it. Or you could post pictures so we can get an idea of what the ring has done.

Here is your local rep.:

ISRAEL
Atlantis Marine Ltd
147 Kikar Atarim
169 Hayaryon St
Tel Aviv 63453 Israel
E-mail: atlantis@inter.net.il
Tel: 972 3 522 7978
Fax: 972 3 523 5150

fstbttms 14-11-2010 10:16

My suggestion is that you repair the Autoprop, sell it and buy something reliable. Never have I seen a prop with more failures than that one.

elenaoprei 06-04-2011 03:45

Re: Autoprop Propeller - Help !
 
A bit late probably, but we too have an autoprop. Truly great thing. However it needs to be clean. That is probably the case with all props, but I couldn't get higher than 2400 rpm (engine designed to do 3300). Got a technician. He told me to scrape the prop. I did and back to 3300 now. There wasn't even so much growth on it, but made a huge difference. The ring is just a spacer, you don't really need it, as long as there is no play. Some great things need many pieces... Cheers Adam

barnakiel 06-04-2011 07:05

Re: Autoprop Propeller - Help !
 
There is a similar working toy from:

PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D

just saying.

b.

Dockhead 06-04-2011 07:31

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by elenaoprei (Post 661017)
A bit late probably, but we too have an autoprop. Truly great thing. However it needs to be clean. That is probably the case with all props, but I couldn't get higher than 2400 rpm (engine designed to do 3300). Got a technician. He told me to scrape the prop. I did and back to 3300 now. There wasn't even so much growth on it, but made a huge difference. The ring is just a spacer, you don't really need it, as long as there is no play. Some great things need many pieces... Cheers Adam

+1

I agree. We love ours. We have one on the new boat, and got twelve happy years out of one on the other boat with no problems whatsoever. They are very popular where we sail and they have a reputation for being very reliable. In fact, they are simpler than other feathering props because they have no gears. There was a problem with the locking washers on certain years of Autoprops which caused retaining nuts to back off and blades to fall off. There was a recall. Perhaps that is what Fast Bottoms is thinking of?

Other than that, I am not aware of any frequent problem with them. Like any variable geometry prop, you must lubricate them and keep an eye on the seals. If you let the seals go, then of course the thing will deteriorate and eventually blades will come off. That is true of ALL folders and featherers.

MaxProp is another excellent feathering prop. The classic MaxProp was feathering but not self-pitching, unlike the self-pitching Autoprop. Now MaxProp have come out with a self-pitching propellor like the Autoprop. That would also be worth considering if you think Maxprop is a better company. But Brunton is a very ancient company which has made propellors for big ships for more than a century. They have awesome engineering resources and are a solid company. Their customer service leaves something to be desired, I should mention, however.

The one major drawback of Autoprops, in my opinion, is the poor anode design. The anodes fall off after the material is eaten away around the retaining screws. This is solved by antifouling around the screwholes, but it is an irritating defect on such an expensive piece of precision equipment.

osirissail 06-04-2011 07:35

Re: Autoprop Propeller - Help !
 
After a year and $4k mistake, I would second Fastbttms' comment. Sell it and get a real propeller - fixed or if you are hung up on feathering, go with MaxProp.

barnakiel 06-04-2011 16:14

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by osirissail (Post 661139)
After a year and $4k mistake, I would second Fastbttms' comment. Sell it and get a real propeller - fixed or if you are hung up on feathering, go with MaxProp.

Autoprop? What went wrong?

Asking because we met people who reversed, but the boat did not. That was in a posh marina ... They held on to that prop but went thru a lengthy conversation with the manufacturer. I believe in the end they got another one (or theirs fixed). It might have been there was a piece of fishing net or something that made theirs mal-function (in a costly maner).

You may have a look at the Max-Prop Ecowind - I posted a link above.

Cheers,
b.

Panamajames 17-10-2011 09:24

Re: Autoprop Propeller - Help !
 
I have enjoyed the autoprop. But when I first boat the boat I suspected something wrong so when I hauled it I realized the bearings were corroded so I too it all apart and ordered new races and bearings. If the prop is left sitting for several months tiny marine animals grow in the bearings and you have to dive and spin each prop blade to free it up. Sometimes a little difficult depending on how long you have gone without running the boat. Over all I like it but I was advised to change over to a fixed blade to minimize problems. Taking it apart myself when I hauled really educated me to this prop. I give it an 8 on a 1-10.

fstbttms 17-10-2011 09:30

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by Panamajames (Post 798351)
I was advised to change over to a fixed blade to minimize problems.

No reason to go back to a fixed-blade prop. All the folding or feathering props from the major manufacturers are robust, bulletproof pieces of gear. Autoprop being the exception.

Panamajames 17-10-2011 09:39

Re: Autoprop Propeller - Help !
 
Question I have a spare 3 blade fixed for back up but have no nut for it. Shaft is
1 1/4 (at least those are the anodes I buy that fit). Please advise me on a nut and threads and pin for my fixed blade. I need to buy one but probably have to order from the states. Thanks

delmarrey 17-10-2011 09:42

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by Panamajames (Post 798351)
If the prop is left sitting for several months tiny marine animals grow in the bearings and you have to dive and spin each prop blade to free it up. Sometimes a little difficult depending on how long you have gone without running the boat.

This is one of the reasons I went with the Max-Prop! They are packed with grease until it oozes out the seams, preventing any water, or sea life, ingress into the works.

But even with that, the growth can accumulate on the outside with lack of use.

delmarrey 17-10-2011 09:48

Re: Autoprop Propeller - Help !
 
1 Attachment(s)
Quote:

Originally Posted by Panamajames (Post 798365)
Question I have a spare 3 blade fixed for back up but have no nut for it. Shaft is
1 1/4 (at least those are the anodes I buy that fit). Please advise me on a nut and threads and pin for my fixed blade. I need to buy one but probably have to order from the states. Thanks

See the attachment........... 7/8"-9 TPI


.

Panamajames 17-10-2011 09:49

Re: Autoprop Propeller - Help !
 
Thanks very much

fstbttms 17-10-2011 09:50

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by delmarrey (Post 798368)
This is one of the reasons I went with the Max-Prop! They are packed with grease until it oozes out the seams, preventing any water, or sea life, ingress into the works.

Not so. The Max Prop is lubricated with waterproof grease, but it is not watertight, nor is it designed to be. Water does enter the body of the prop. But the tolerances in the seams between the body parts are too close for any fouling organisms to get in. Or more precisely, they are too close for any sizable fouling organisms to get in. In any event, the guts of a Max Prop are not exposed.

delmarrey 17-10-2011 10:00

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by fstbttms (Post 798374)
Not so. The Max Prop is lubricated with waterproof grease, but it is not watertight, nor is it designed to be. Water does enter the body of the prop. But the tolerances in the seams between the body parts are too close for any fouling organisms to get in. Or more precisely, they are too close for any sizable fouling organisms to get in. In any event, the guts of a Max Prop are not exposed.

If water gets in then the instructions were not followed properly. It calls for no air space during assembly. Even if assembled under water, pumping grease into the zerk fittings is suppose to force out the water. But what do I know?

fstbttms 17-10-2011 10:07

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by delmarrey (Post 798382)
If water gets in then the instructions were not followed properly. It calls for no air space during assembly. Even if assembled under water, pumping grease into the zerk fittings is suppose to force out the water. But what do I know?

No offense, but there is no such instruction in the manual. In fact, packing the body with as much grease as you are advising would impede the operation of the prop.

delmarrey 17-10-2011 10:21

Re: Autoprop Propeller - Help !
 
Quote:

Originally Posted by fstbttms (Post 798387)
No offense, but there is no such instruction in the manual. In fact, packing the body with as much grease as you are advising would impede the operation of the prop.

That's the impression I get in 2-D & F, and 6 - p. 4 & 5 of the instruction manual. >> https://www.pyiinc.com/images/pdf/max...structions.pdf

fstbttms 17-10-2011 10:37

Re: Autoprop Propeller - Help !
 
Nowhere in the manual does it say that there must be no air (or water) in the body of the prop. Yes, you lube it until you see grease coming out of the seams. But this does not mean you lube it until there is nothing but grease in the body of the prop. In fact, PYI will tell you that after lubricating the prop, if the blades do not rotate easily, to take the zerk fittings out and move the blades and let the excess grease escape. It is absolutely possible to put too much grease in a Max Prop.

Silver Cloud 10-11-2011 18:41

Re: Autoprop Propeller - Help !
 
I have an Autoprop. AB Marine had rebuilt the prop in 2007. In May of 2009 and 225 hours later a blade came off. I sent it to AB Marine who sent it Buntons Marine in England. Buntons Marine replaced the blade for $1500. I had the prop lubricated every six months. I am always in deep water. It never touched anything but saltwater. I only go to Catalina and back. Other than the lost blade there was not any evidence of damage or distress.

At the time Steve Armitage of AB Marine told me that losing a blade was a “rare occurrence” and that he did not have an explanation for why the blade fell off. David Sheppard of Brunton's Propellers Ltd, told me losing a blade is an “an exceptional case”. Contrary to their comments the prop has been subject to a recall for lost blades. If you search other support groups and blogs you will find many others that have lost Autoprop blades. It demeans their credibility to say otherwise.

Although I enjoy the performance of my Autoprop my experience with AB Marine and Brunton's Propellers has been extremely disappointing. They are unwilling to stand behind their expensive product. In all their replies I feel like I am hearing from a politician trying to avoid giving a straight answer. I would stay away from anything that might need to be serviced by AB Marine or Buntons Marine (Varifold, Autoprop, Gori).


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