Hydroelectric won’t shift into reverse

[StarcraftTR150]

Hi everyone,
I have a 60hp hydroelectric drive Johnson outboard, model number: 60ESL-710 that came on an old trihull that I just picked up. It’s runs great other than when I put it in reverse, the prop spins forward. Both neutral and forward gears work without issue. I replaced the lower unit gear oil with appropriate type c oil before I took it out for the first time. Anyone else have this problem? Does this mean my lower unit is toast? Thanks

 

[Faztbullet]

Check voltage to solenoids when in reverse...could be shifting switch in control box

 

[racerone]

Remove sparkplugs.----Find the wires that go into the lower unit.----Apply 12 volts to both green and blue.-----Turn flywheel with an 1-5/16" socket.----If you get reverse in just TWO turns there is nothing wrong in the gearcase.-----In my opinion these electric shift units are very good, reliable and easy to fix.----Most folks do not know how simple they are !