need timing figures for '84 merc 150

[dadgummit]

I know what the book says, but I'm curious what an exp. mechanic recomends. I need timing figures for an older motor to achieve good idle quality and top end. Motor has good compression, and also has the idle stabilizer box removed. Thanks.

 

[j_martin]

Re: need timing figures for '84 merc 150

Inline, V6, XR2, whatizit?

 

[dadgummit]

Re: need timing figures for '84 merc 150

Sorry, it's a v-6 black max. Thanks.

 

[j_martin]

Re: need timing figures for '84 merc 150

Idle timing is what works with the throttle butterflies fully closed. The link n sync should get it close enough to start up and not race to extinction. Then set it when on the lake with the idle speed adjust screw. Don't forget to check your throttle cable tension after you change idle timing.

WOT timing is about 23 degrees. On some engines, you set it at 19 degrees, and the other 4 degrees are made up by the "advance" module at a certain RPM, usually 5000. If you remove the module, change WOT timing to 23 degrees.

Those are safe numbers with reasonable gas and reasonable compression.

hope it helps
John

 

[dadgummit]

Re: need timing figures for '84 merc 150

I will try those settings. Thank you very much!