Did I screw up?

[Big T Bassman]

Just did a compression on a 1996 150 EFI. I removed all the plugs and did a quick check. I did not ground the wires which I now see is the proper way for an outboard. In reviewing past posts some advise, doing this or you could burn up a control box. Please tell me I'm ok. Thanks

 

[cfcstl]

Re: Did I screw up?

I too would like to know how to ground the plugs or wires when checking compression. <br />Just curious what techniques people use to ensure grounding of plugs or wires.

 

[rodbolt]

Re: Did I screw up?

well if I am not checking spark and just compression I jut pull the stop lanyard. this does not work on 95 up johnnyrude but works on mercs. if not then open the wallet and buy an s-48 or equivalent spark tester

 

[achris]

Re: Did I screw up?

Never bothered grounding or disabling the spark. Just make sure I didn't touch the wires while checking the compression. Never blown a pack.<br /><br />Chris.......

 

[KCLOST]

Re: Did I screw up?

I have rigged up a cheap series of leads that run from each plug boot to a common ground... It looks crazy but it works.... I remove every plug lead when doing a test and just pull the plug that goes to the cylinder I'm measuring. Repeat as necessary.. I've always done it this way so the engine wouldn't fire up...<br /><br />But that stop lanyard thing is a great idea!!!!