1966 Mercruiser 110 I4 153 Cui. Timing

[Bud420x20]

Which one is correct?


#1
October 27th, 2004, 05:55 AM
Re: Mercruiser 110 tune up specs

plugs .035--pts. .016 or dwell 39 to 45 degrees timing 8 degrees at 800 rpm with mid grade gas. Run some product thru the engine before adj. the valves that may stop the noise. [ATF?] if that don't work the adjustment is 1 turn down from slack, I set most at 3/4 --bob

#2
Solec Manual says the dwell is 28-34*
Adjust timing at idle speed.

 

[achris]

Neither....

Here's a direct grab out of the genuine Merc manual for that engine...

 

[Bud420x20]

Is the timing set at idle (500-600) or 800 rpm? Is there any timing tolerance like +- 2*?

 

[kenny nunez]

Try to set the timing with the engine idling as slow as possible so that the centtifagal advance does not give an advanced reading.

 

[Scott Danforth]

set timing in gear, in the water, at idle (600 RPM). preferably tied to the dock or still on the trailer.

 

[achris]

Dwell and timing can be set in neutral, with the engine running at 500-600rpm. But the final setting of the idle speed must be done in the water. In gear and 'unhindered'. That is, not tied to a jetty or trailer.