1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 125Get this manual
Engine Synchronizer Wiring Diagram-Commander GaugesWiring Diagram auge ne edle to point toward slow running engineTA TA GIN NIZ AU AT SENDER ND AT SENDER ND TA RT GIN E
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Wiring Diagram auge ne edle to point toward fast running engineTA TA GIN NIZ AU AT SENDER ND AT SENDER ND TA RT GIN E