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Old 23-12-2011, 07:21   #1
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Nanni engine install to replace a perkins 4107

I have just ordered a Brand new nanni 43HP engine with Hydraulic propulsion to replace my aged 4107. I have not made the transaction as yet but...
Has anyone else made this choice or any insight into it.
power loss etc compared between shaft and hydraulics etc?
prop sizing?
pros and cons?
install problems?

I have now a 4107 running through a vee drive and back out underneath the engine, I am replacing it with a 43hp engine through a hydraulic drive?
Is the powerloss from the 4107 to the vee drive going to be the same as the powerloss from the 4.43HD (43HP) to the Hydraulic driven propellor?
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Old 23-12-2011, 07:49   #2
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Re: Nanni engine install to replace a perkins 4107

I have worked on a Faryman Hydraulic Drive

The Unit was compact and the oil reservoir was self contained.

Good response in forward and reverse.

There will be some engineering involved to mount the hydaulic motor and route the hoses.

You may also need a separate hydraulic tank and oil cooler.

If you can provide a link to the unit you are getting....that would be helpfull
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Old 23-12-2011, 07:55   #3
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Re: Nanni engine install to replace a perkins 4107

Quote:
Originally Posted by Chief Engineer View Post
I have worked on a Faryman Hydraulic Drive

The Unit was compact and the oil reservoir was self contained.

Good response in forward and reverse.

There will be some engineering involved to mount the hydaulic motor and route the hoses.

You may also need a separate hydraulic tank and oil cooler.

If you can provide a link to the unit you are getting....that would be helpfull

the engine is a nanni 43hp

43HP Nanni Diesel Marine Engines from A R Peachment
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Old 23-12-2011, 08:00   #4
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Re: Nanni engine install to replace a perkins 4107

I did a search on boatdiesel for hydraulic efficiency and found this quote, which pretty well sums it up:

"As to overall EFFICIENCY, do not kid yourself.. In the best case scenarios, working with closed loop systems operating at peak efficiencies and pressures, you may see 80-82% at best, but 50-70% overall would be the norm."

This was by Tony Athens who runs a marine diesel shop in SoCal and has installed several hydraulic prop drive systems. He also recommends working with someone who has done it before.

David
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Old 23-12-2011, 08:21   #5
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Re: Nanni engine install to replace a perkins 4107

Quote:
Originally Posted by nauticalnomad View Post
I have just ordered a Brand new nanni 43HP engine with Hydraulic propulsion to replace my aged 4107. I have not made the transaction as yet but...
Has anyone else made this choice or any insight into it.
power loss etc compared between shaft and hydraulics etc?
prop sizing?
pros and cons?
install problems?

I have now a 4107 running through a vee drive and back out underneath the engine, I am replacing it with a 43hp engine through a hydraulic drive?
Is the powerloss from the 4107 to the vee drive going to be the same as the powerloss from the 4.43HD (43HP) to the Hydraulic driven propellor?
Replaced my Westerbeke 4-91 with the Nanni 37.5HP using the same Vee drive as came with the boat (but new as the old one was shot and internally rusted). Can't say about loss, but LOVE my Nanni!!! Great engine. Because the exhaust set up was backwards compared to the Westerbeke, had to have some fancy plumbing made to prevent water siphoning back through the exhaust valves, but once that was fixed it's a great engine.
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Old 24-12-2011, 07:58   #6
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Re: Nanni engine install to replace a perkins 4107

You show an engine but no details aboot the hydraulic drive.

Is this what you are looking to do?

http://www.bountyboats.co.uk/hydraulic.html
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