OMC Cobra Stringer 4.3L Manifold Drain Cover Cap Plug 1978-93 5.0L 909829 200hp Mercruiser Propeller You will need to install

You will need to install your existing trim lines on these

but this is up to your discretion

Removed from a 1971 Mercury 80hp 800 four cylinder 2 Stroke Outboard (Serial # 2986444 thru 3148653)

Looks like it says Atwood A-16 on the base

Basically from the Mercury propeller guide

OMC Cobra Stringer 4.3L Manifold Drain Cover Cap Plug 1978-93 5.0L 909829 200hp Mercruiser Propeller You will need to installItem Condition and Notes: Good Condition Used from 1978 1993 Comes with Hose Clamps Please Inspect Pictures for condition Part #'s Manifold Cap: 909829, 0909829, 3852476 Yours should look like this one. Please ask if you are unsure if this part will work for you. Please send model and serial number. You will receive what is in the pictures. Please inspect pictures closely for condition. Purchase with confidence! Please contact me with any additional