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 9.8 Nissan/Tohatsu - add to preflight checklist		  New Topic  Topic Locked
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Initially Posted - 07/08/2010 :  15:50:03  Show Profile
Last week, coming in from a session with newbies, I heard a "clunk" sound and, looking back, noticed the outboard at an odd angle and not responding well. Both nuts at the end of a bracket just under the motor had come loose. From now on, I will check them before starting the motor. I refer you to Fig. 17A, nut #29, in the parts manual. When I figure out how, I'll try to transfer a pic of the page. It's an 8mm nut.
DavidP
1975 C-22 SK #5459 "Shadowfax" Fleet 52
PO of 1984 C-25 SK/TR #4142 "Recess"
Percy Priest Yacht Club, Hamilton Creek Marina, Nashville, TN
Edited by - dmpilc on 07/08/2010 20:21:21

redeye
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3476 Posts
Response Posted - 07/09/2010 :  05:04:16  Show Profile
Loctite 430?
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DaveR
Master Marine Consultant

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USA
2015 Posts
Response Posted - 07/09/2010 :  05:51:46  Show Profile  Visit DaveR's Homepage
The outboard lock should take care of that.
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redeye
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3476 Posts
Response Posted - 07/09/2010 :  07:26:15  Show Profile
And the extra line on the engine. A line tying the engine to the mount.
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 07/09/2010 :  07:31:47  Show Profile
Dave, this has nothing to do with the outboard lock. This is the mechanism that holds the motor upright and secured to the mount bracket. There are 2 spring loaded rods (#18 in the pic below) that go from the mount around each side of the motor shaft. Behind the shaft there is a rectangular buffer plate that goes over the 2 rods and is held in place by a pair of nuts (#29) with a washer flange. It is those nuts that came loose. John at Outboardsonline wrote me that he knows of only 2-3 instances where this has happened and thinks they may not have been tightened properly at the factory.

Took a photo of the computer screen to load this:
Edited by - dmpilc on 07/09/2010 08:13:08
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redeye
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Response Posted - 07/09/2010 :  08:35:50  Show Profile
Regular Loctite.

The loctight 430 is superglue, although that would probably work also.
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bigelowp
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1778 Posts
Response Posted - 07/09/2010 :  09:06:42  Show Profile
How old is the engine and do you trailer or dock the boat between uses? I have an 07 that is on the stern of a boat that is on a salt water mooring. This type of failure could be disastrous!
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 07/09/2010 :  09:50:40  Show Profile
I purchased it at Christmas, 2007 and it went on the boat spring, 2008, so it's been on the boat just a bit over 2 years. Boat has been out of the water only once, in June 2008, for some repairs and bottom touch-up.
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redeye
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Response Posted - 07/09/2010 :  10:12:32  Show Profile
Yepper... I'll betchya that just went on a lot of preflight checklists..
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 07/09/2010 :  13:34:16  Show Profile
The nuts are a bit tough to get to, but it is possible to reach them with a finger and tell if they are loose.
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DaveR
Master Marine Consultant

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USA
2015 Posts
Response Posted - 07/09/2010 :  13:43:55  Show Profile  Visit DaveR's Homepage
Ok, I get it now. Holy Crap, that is an odd thing!
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.