What RPM should I be at when adjusting timing?

[backacres]

Hi Guys,<br /><br /> I have a 1987 Merc. 3.0L and the manual states that the timing should be 6 deg. BTDC. I assume that I should be checking this at idle, but not sure of what the RPM's should be: 700-800??<br /><br />Thanks for the help!!<br /><br />Jeff

 

[vipzach]

Re: What RPM should I be at when adjusting timing?

700-800 should be the idle speed. I think it may be a little higher running on the muffs.

 

[rodbolt]

Re: What RPM should I be at when adjusting timing?

also depends on what ign system it has. the timing procedure varies with ign type.