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Old 14-08-2011, 05:37   #1
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Vovo Penta MD2040 S-Drive Problem


I have a Volvo Penta MD2040D and changed the anode yesterday while in the water. When I put the prop back on the shaft, and then the screw on cone, There is a gap between the prop and cone of about 1 inch. It is as though the shaft is too long??? I have not taken out the shaft, is it a one piece shaft and gear? Or a shaft, and a pressed on gear. The bearing housing is securely connected to the S-drive. I was thinking that the only way the shaft could begin to extend is if the shaft is a multiply part, shaft and gear, and it is actually pulling away from the gear. There is no noticeable wobble on the shaft. It seems secure.
Any ideas?

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Old 14-08-2011, 05:52   #2
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Re: Vovo Penta MD2040 S-Drive Problem

You don't mention part 25, the spacer. Is that present and correct?

I believe the gear is heat fitted to the shaft so could theoretically move... but I doubt it.

I'm no expert, but I have fitted new saildrive oil seals to my MD2040 and S120 setup plus many anodes, so have been in that area of the boat a few times!

I see you are in Grenada... I had work done on my saildrives at Grenada Marine. They seem to know what they are doing. We'll be back there - weather permitting - in the next week or so.
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Old 14-08-2011, 06:05   #3
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Re: Vovo Penta MD2040 S-Drive Problem

Yes, part # 25, that is a sad story. I have not had that part so in my resent vacation to the States purchased it and a number of other spare parts. Intention to bring them down to the island. Well, they are sitting on a chair in Maine. Left in the confusion of a 4 AM departure to the airport. As I remember, # 25 looked like a light metal spacer of some sort. Does it take up the space between the s drive and prop.
We are in Grenada and I have pulled out at Grenada marine. Limited parts though but they can order and have brought in. Look forward to talking to you over the net channel #68. We are Aloisius in Secret Harbor (Mt Hartman)
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Old 14-08-2011, 07:11   #4
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Re: Vovo Penta MD2040 S-Drive Problem

On our 120s saildrive, we put several thin plastic spacers in there to make up the room. They are about 2.5 inches in outside diameter, approx shaft diameter or a bit bigger on the inside. Each is perhaps 1.5mm thick.

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Old 14-08-2011, 08:04   #5
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Re: Vovo Penta MD2040 S-Drive Problem

Yes it does go between the saildrive and the prop and is maybe about an inch in length. See you soon!
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