slight electric shock on throttle handle

[Home Cookin']

1987 70hp Johnson--been chasing electrical issues for several months, since I bought this motor used--the 20A fuse blows, usually at high RPMs.
I have replaced the regulator, solonoid, the wiring harness ($$!) and the controls (with a used set). A good mechanic did the work, and twice worked on the wiring of the controls. But obviously there is a short somewhere.
I noticed a slight tingling (shock) if my hands are wet when touching the metal throttle handle and the SS steering wheel. Besides an obvious frayed wire in the controls, where might I look for this "leak"? Anyone else see something like this? I feel like this must be a clue for this odd short's location--tried everything else.

PS the 20A fuse line covers just the starter, fuel guage and PTT. I know when it blows when the fuel guage drops.

 

[mikesea]

Re: slight electric shock on throttle handle

if your keyswitch is in the control box Id think you have a leak in there .A good place to start to loo is the grey wire for the tach pulse,that could knock you on your kister if your wet and its leaking good.Or,if your Trim and tilt is on the handle,it could be chaffed .Something is leaking to the box,in my opinion