Group Information- Members: 325
- Category: Boating
- Founded: Oct 28, 2005
- Language: English
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Description
This group is dedicated to discussion of the Universal Atomic 4, a
30-hp, four-cylinder, gas-fuel, inboard auxiliary engine, typically
found in recreational sail boats.
We gladly share the knowledge and experience we've gained from
operating, maintaining, fixing, and rebuilding these engines.
Sometimes you can even get two of us to agree on something.
In addition to the mail list, members' resources include:
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Re: prop modification
I don't see much chance that it will be what you want when you're done. When a prop shop cuts one down, they shape and balance it on a lathe - not easy to get
Posted - Wed Dec 16, 2009 1:17 pm
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Roger A Karmes
rkarmes
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Re: prop modification
Hi Folks, I have a direct drive Atomic 4 and use a 12-inch, 3-bladed prop with a pitch of 6. With the prop clean, I can get 2500 RPM out of the engine. When I
Posted - Wed Dec 16, 2009 3:42 am
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Bill Gilbert
poqbill
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Re: prop modification
You're prop is definitely too large if your A4 is a direct drive. A 3 blade should be 2-3 inches less diameter and have a pitch of about 6-7. Why don't you
Posted - Wed Dec 16, 2009 2:32 am
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Steve Botts
sbotts...
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prop modification
I have a 3 blade 13 inch prop (indeterminate pitch) and can only get about 1500 rpm at max rpm which is about 4.5 knots. I have had a hankering to go for one
Posted - Wed Dec 16, 2009 12:26 am
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Nick
sailvela88
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Re: new parts on old
The disributer and starter are different. As for the impeller housing, depends on how old the engine is and what water pump it had. When you say
Posted - Sat Dec 12, 2009 3:35 pm
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marv33t@...
morgan33t
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Message History
Group Email Addresses
| Post message: |
atomic4@yahoogroups.com |
| Subscribe: |
atomic4-subscribe@yahoogroups.com |
| Unsubscribe: |
atomic4-unsubscribe@yahoogroups.com |
| List owner: |
atomic4-owner@yahoogroups.com |
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