I think you wired the solenoid wrong. Does it start cranking when turn the key to the start position, then never stops? If so, you probably did. Battery (+) to one big sol post. (Doesn't matter which one.) From the SAME POST to the key. Start position on the key to the SMALL solenoid post. Other BIG solenoid post to the SG. I'm sure Roland has a pic floating around on here somewhere.
The jumper wire on the safety switch won't affect it. That is NOT causing the issue.
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