4.3LX Mercruiser (1994) Tune-up Questions

Woody-jh

Seaman
Joined
Jul 24, 2005
Messages
59
Engine Serial is OF421280. (1994 Mercruiser)

1) I am not getting consistent specs for the tune-up that I am going to do.

a)Engine Cover Decal
-Plugs 0.035" gap and Timing 8 BTDC
b)Owner's Manual
-Plugs 0.035" and Timing 10 BTDC.
c)Mercruiser Manual 18, pg 1B-7
-Plugs 0.040" and Timing 8 BTDC.

Which values do I use? An for removing the plugs, cold or warm engine?


2) Also, how easy (or not) is it to remove the Rotor and Wheel, since I understand that they are secured to the distributor shaft with Loctite? The procedure is in Mercruiser 18, Page 4B5

Thanks, Woody-jh
 

Woody-jh

Seaman
Joined
Jul 24, 2005
Messages
59
Re: 4.3LX Mercruiser (1994) Tune-up Questions

Posted May 31st, no replies yet. Posting again, hoping somebody can help out.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 4.3LX Mercruiser (1994) Tune-up Questions

The decals on the flame arrestor cover are the last word. If the manual was printed wrong, there would be service bulletins to change the decal. There are no changes for your engine.
Service manuals may get changes, but the changes are only sent to certified dealers. Owners manuals are the last source to use. If they are wrong, there is no way to get them updated.
 

Woody-jh

Seaman
Joined
Jul 24, 2005
Messages
59
Re: 4.3LX Mercruiser (1994) Tune-up Questions

Thanks Don- that sure sets it straight!
 
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