Compression amp Spark Check

[stormdad]

"1987 MERCURY 35 ELPTO OB20552

"1987 MERCURY 35 ELPTO OB205529
Hello All,
Yet another "waiting on the manual" question...
When I do my compression and Spark check do I need to disable/disconnect the coil or Switch box?

-Chris"

 

[galamb]

"Chris, for the compression ch

"Chris, for the compression check you either need to ground the plugs or if you have a "kill" switch, set it to off. That way the charge produced by the switchbox and coils has somewhere to go (prevents damage).

For the spark check, you definately need the those working

"

 

[stormdad]

"Thanks Graham,

When checki

"Thanks Graham,

When checking compression do I leave the 2nd cyl spark plug out?

-Chris"

 

[galamb]

"I do, it makes turning it ove

"I do, it makes turning it over alot easier.."