I have not but when I get off of work I will try. Do you know what they are used for.

GRAb a free loaner fuel psi tester from Autozone on your way home too.

Ok so I tested the fuel pressure and it was 40 psi while cranking and I swapped the relays on the top of the engine and it still won't start. I call a local service center near me to get it scanned but the soonest they can get me in is in two months. Any other suggestions?

Rinda Technologies Inc. Marine and Industrial Engine Diagnostic Tools

good investment

Where are you located?

Albuquerque New Mexico

Okay, so this is where we stand. Fuel psi okay. Tach shows cranking dpeed (should actually be closer to 4-500 rpm) , therefore crank sensor should be okay.
No spark though. So, lets look into this. Sorry for basic question but have to ssk - how did you check ?

I used a inline tester that lights up when there is voltage

I don't know the ins and outs of the 496 ECM but I know there's a crankshaft sensor and a camshaft sensor. Wouldn't surprise me to find out crank sensor measures RPM and cam sensor controls ignition.

On a side note, there are a few different types of both sensors so make sure you get the one for your eng serial number if replacing.

Some good tests/look see’s/info:
https://forums.iboats.com/threads/me...diacom.570913/