Yamaha 704 dual engine Trim issue

EMC 1810SS

Petty Officer 2nd Class
Joined
Aug 20, 2010
Messages
176
I have a weird issue with my Dual control trim. Both of the independent trim switches work fine, both up and down. When I use the switch for both engines, both go up, but the port engine does not go down. I have to use the independent switch. I have checked all of the connections and cleaned them. Any Ideas?
 
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