sturdy

I just bought a 1997 370 Sundancer with 7.4 MPI Horizons. I'm hoping someone with boats in that vintage can help me out. I have the Sturdy Engine Synchronizer (I think it's the first generation, because the manual posted on these forums is for a later version). When I try to engage the synch...

Starboard side throttle will not engage. Both control boxes sent back to sturdy and diagnosed, and upgraded. i put brand new batteries in. When i put her into overide, the throttle works great. I am going to switch out the boxes on the engines. any thoughts. direct email, rollfs@svn.com