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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

4 stroke motor mounts

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cdreamonly
1st Mate

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27 Posts

Initially Posted - 11/02/2005 : 21:28:49

I have been looking to replace my outboard motor mount and have noticed that a lot of catalogs specify "not for 4 stroke outboard motors" A 4 stroke will weigh more per hp than a 2 stroke motor, but as long as the it does not exceed the mount weight rating it should be OK right?....or is there something else about 4 stroke motors that you have to worry about?

83 tall rig w/k

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/02/2005 : 22:24:51

I recently changed to a 4 stroke and the difference in thrust was amazing. It makes my new 4 spring super 4 stroke mount jump like crazy when I change gears at anything less than the lowest RPM. I can imagine some mounts not being able to handle the thrust issues.

Edited by - on

Douglas
Master Marine Consultant

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1595 Posts

Response Posted - 11/02/2005 : 22:46:18

Yea its called liability

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 11/03/2005 : 19:05:25

Garhauer makes three different versions of their outboard motor mount. Structurally, the mounts are identical with the only difference being the number of springs on the mount (2, 3, or 4) which assist in lifting.

I've only seen pictures of their recent mounts, and aside from the number of springs, it looks to be identical to my original Garhauer motor mount.

Edited by - dlucier on 11/03/2005 19:15:52

cdreamonly
1st Mate

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27 Posts

Response Posted - 11/03/2005 : 22:46:35

Thanks for the replies....Higher thrust....is that caused by lower RPMs, and a change in prop pitch over what is typically used on 2 strokes? 4 stroke motors typically have better low rpm torque so I would imagine that with a 4 stroke you might want a "stiffer" mount to be able to handle the torque and not fatigue. You can tell that my boat is out of the water for the winter and I have plenty of time to contemplate things like this......

Are the mounts from Catalina Direct Garhauer?

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/04/2005 : 11:04:54

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by dlucier
 Garhauer makes three different versions of their outboard motor mount. Structurally, the mounts are identical with the only difference being the number of springs on the mount (2, 3, or 4) which assist in lifting.

I've only seen pictures of their recent mounts, and aside from the number of springs, it looks to be identical to my original Garhauer motor mount.

<hr height="1" noshade id="quote"></blockquote id="quote">
The 4 spring does have longer braces that mount against the transom.

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 11/04/2005 : 13:14:54

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by fhopper@mac.com
 
The 4 spring does have longer braces that mount against the transom.

<hr height="1" noshade id="quote"></blockquote id="quote">

Is that the only change they made to make it a 4 stroke mount?

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by fhopper@mac.com
 I recently changed to a 4 stroke and the difference in thrust was amazing. It makes my new 4 spring super 4 stroke mount jump like crazy when I change gears at anything less than the lowest RPM.<hr height="1" noshade id="quote"></blockquote id="quote">

The one thing about the Garhauer mount is the few inches of up and down travel that exists when it is in the lowered position. This inherent travel results in the mount dancing when in reverse, although mostly when using higher rpms.

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/04/2005 : 21:15:17

I believe it is the only difference. I think all the models have the wider 4 stroke mount board.

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Gene DeMambro
1st Mate

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33 Posts

Response Posted - 11/06/2005 : 12:29:22

On a somehwta related note, the piece of wood where the motor attached to the motor mount on my boat needs repalcing. Any ideas on what to replace it with?

Gene

Edited by - on

rclift
Navigator

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USA
152 Posts

Response Posted - 11/06/2005 : 18:55:09

Gene,
My Honda 8 xls classic weighs in at 84 pounds so I elected to keep the old mount and upgrade with the new board and stainless steel backing plate. This has worked fine for the last 4 years. Each piece was $39. from Catalina direct.

Edited by - rclift on 11/06/2005 18:58:42

dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 11/06/2005 : 19:48:57

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Gene DeMambro
 On a somewhat related note, the piece of wood where the motor attached to the motor mount on my boat needs repalcing. Any ideas on what to replace it with?

Gene
<hr height="1" noshade id="quote"></blockquote id="quote">

Gene,

Unless it came this way, the previous owner of my boat replaced the mount pad with a [url="http://www.garelick.com"]Garelick[/url] mount.

Edited by - on

tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 11/09/2005 : 18:59:51

Don,

Don't see the bolt holes to bolt the motor onto your board. Don't you use them? Or didn't you get to it yet?

Val on the hard DAGNABIT # 3936

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/09/2005 : 19:43:57

What bolts are you talking about?

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 11/09/2005 : 20:46:28

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by tinob
 Don,

Don't see the bolt holes to bolt the motor onto your board. Don't you use them? Or didn't you get to it yet?
<hr height="1" noshade id="quote"></blockquote id="quote">

Are you talking about a security bolt through the pad and motor mount? If so, no, I don't use them. I use one of those almost useless MasterLock outboard locks.

Edited by - dlucier on 11/09/2005 20:54:44

tinob
Master Marine Consultant

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USA
1883 Posts

Response Posted - 11/10/2005 : 09:26:39

Yes that's what I'm talking about. I'm surprised, but then I noticed that Frank wasn't using them either. I don't use them for security so much as for keeping the motor from flying off. The new four strokes especially have a very shallow purchase on the motor block compared to the depth that the old Johnson 2 stroke had and even that one I through bolted. Better safe than sorry.

Val on the hard DAGNABIT # 3936

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 11/10/2005 : 10:39:30

I agree with Val about bolting the motor to the mounting pad. I'd say it's particularly important for high thrust props (in reverse) and long trips. Over the years, I've heard countless sad tales of outboards sliping off transoms (of small power boats). At the very least, every outboard not bolted directly through the transom (with the possible exception of dinghies) should use some sort of safety leash. Using a bicycle cable and marine grade padlock also serves as a theft deterent.

-- Leon Sisson

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