FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
I have a 73 Mercury 850. It runs but the lower unit is bad. I found out that the lower unit can be interchanged with different years and horse powers. (up to 86 and up to 90hp) Are there any parts in the powerhead that I can interchange with simular models. Parts are getting scarce.