Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 301Get this manual
Centerline of Engines Specified 18"19" MinBetween 19"22-12" Between 21-12"25-12" Between 25"29" Between 28"32" Between 31"35" (In Metric Scale1"
Required Coupler(s) between Steering Eyes
9" Coupler (Supplied with Kit) 12" Coupler 15" Coupler Two 9" Couplers (Connect Together with Coupler Link Rod) 9" Coupler and 12" Coupler (Connect Together with Coupler Link Rod) 9" Coupler and 15" Coupler (Connect Together with Coupler Link Rod)
= 2.54cm)=Steering Eye
9" Coupler (C-77144-1)
Steering Eye
12" Coupler (C-77144-2)