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fixed.

it was a combination of things!

Not sure what the GPS speedo has to do with the MSD box? Did you check your main breaker?

Quote:

Originally Posted by ar15meister (Post 3460026)

Out running yesterday. boat was running great. all of a sudden gps speedo and rpm gauge went haywire and i began to back off and the boat quit.

wont start up had to be towed in.

I am thinking it is my msd box. I just had the motor out and it seems as if the msd was hooker to the battery and the starter by the shop. could this be the reason for the failure?

primary power supply wire to the dash/ignition switch maybe... but the msd does run the ignition and the tach and those bosxes are really junk. check the wire at the dash or and at the master plug at the motor. and throw away the msd anyway and put something good in... like the stock stuff.

Quote:

Originally Posted by fireboatpilot (Post 3460063)

Not sure what the GPS speedo has to do with the MSD box? Did you check your main breaker?

My thoughts as well. GPS going haywire makes me think you have an electical issue. Did you check the easy stuff like volts at the battery and alternator?