Timimg on mercury

[George62]

1985 mercury 150 black max xr2
I can find what the idel setting is .
Any help please

 

[Chris1956]

Generally the idle pickup timing for those ADI ignitions is 0-9* ATDC. That is the timing setting with the carbs closed, but ready to open.

The timing at idle speed is not specified or important, once idle pickup timing and max spark advance (21*BTDC) is set properly.

 

[Faztbullet]

That year is set at 22° at cranking speed

 

[George62]

Awsome THANK YOU
Mine is at 7
But still don't Scream like it used to. Rebuilding the carbs right now hoping that solves the problem Melted a piston last year replaced it rings homed out Good compression and replaced the trigger I broke. When I put it on a lake it's only at 75% of its power Any ideas why

 

[George62]

Everything else is good the reeds are perfect Good compression on all 6 cylinders

 

[racerone]

What kind of sealer did you use when closing up the block ?---Does spark jump a gap of 3/8" on all leads ?----Wires from switch boxes hooked up to correct coils ?

 

[George62]

High temp
Gapless plugs
Wires gone though 3 times
Numbered everything
I have been in maintenance for more then 40 yrs
But these two strokers get me

 

[racerone]

Crankcase must be sealed with--- loctite 518---or equivalent.----No RTV to be used.----The question was-----Does spark jump a gap of 3/8" on all leads?----The question is not what kind of plugs are in the motor.----V-6 motors run remarkably well on 5 of 6 cylinders.

 

[George62]

Please define jump up gap of 3/8

 

[George62]

Length of spark?

 

[racerone]

You want to test / put ignition through it paces.---See if it develops designed output.---So does spark jump a gap of 3/8" or more on each lead.----You can do yourself a favour by learning to do this test !!

 

[jimmbo]

These outboards are not tuned like you are tuning a Car from the 60s or 70s. There is no Spec for Idle Timing, as the Timing is what is adjusted to get the desired Idle Speed.
Melting a Piston, usually requires more than just Honing a Cylinder, and putting in a new Piston and Rings. What caused the Meltdown, lean Carb?

'75% of its power'.
Sounds like a dead/weak Cylinder.

As previously mentioned; Spark, leaky Crankcase. You have Carbs on the to-do list. Make sure to do a Link and Sync once it is back together

 

[George62]

Oil mixer took a ****. Warning buzzer was not working .caps had cracks
All compression is the high 90s
What's a link and sync

 

[Faztbullet]

Check with a different tester as thats wayyy to low,,,should be 120+ with the small cc heads.

 

[George62]

It's a 1985 motor
Stock is 135
I cant get a new one or even a newer one
Live with I got or not ...lololol