Casey6404

Ok, first off, I can be an idiot. I have practiced long enough and have really gotten good at it.

I replaced an impeller a year ago on my ‘99 Mercury Optimax 150 and I now have this part left over. To be honest, I’ve run the boat over a year without it due to just finding it in my battery compartment today. I must have set it on the rail and it fell down there. My guess is it had to come from when I did the impeller as I’ve done no other major work to the boat or motor.

I’ve done some research and can’t find it on a parts diagram. I’ll give the first person who correctly identifies the part and tells me where it goes $10 through Venmo or PayPal, or by mail, etc. Let the contest begin................

757SeaHunt

I don't know exactly what it is but at inch 1 and at inch 5 it has been worn down some. It is a pin of some sort... Maybe to tilt the motor up and secure it? how about for your trailer breaks? No need for $$ if I'm right =-)

Tim71

It does look wheel related since it looks like a lug nut stud that gets pressed in, with the ridges around the head. I am guessing some type of wheel alignment tool like shown below. It can be tough to get a heavy tire onto all of the lugs, maybe this helps, or maybe it is for a specific make like the BMW one below.

usernamewastaken

100% the knurled section is for press fit to something

Wickedfisha

Pin to limit tilt/trim going all the way down?

oceandansar

That is an automotive hinge pin. Looks real similar to one used in a Chevy truck

maintenanceguy

door hinge pin

Poorbastard

I asked the wifey and she had no clue.

Smitty 45

Times two , pay the man !

Chpsk8

It’s the adjuster pin for how low the motor will go when fully trimmed down. (Posted above also)

hottoddie

Agree X2. Hinge pin that got mixed in with the motor parts. Pay the man his $10

Grunts N Grits

Brass door hinge pin, similar to lots of these shown here.
Could of got in the boat in a jillion different ways........including a crow dropping it in there.
https://www.homedepot.com/b/N-5yc1v/...e%2Bpin?NCNI-5

km1125

I'd go with the hinge pin thing too.... but then I looked closer... Near the bottom is that a machined grove for something like a "C" clip?

757SeaHunt

It certainly looks like a door hinge pin, (thanks other posters) they make for a great improvised punch tool.

Cheesesteak

I've never seen a door hinge pin with the serrated end like that. They are usually just true "pins."

757SeaHunt

I would have agreed with you 100% until 10 minutes ago.

Smitty 45

Nope , it's a house door pin .

Thalasso

House door hinge pins don't have a shoulder on it much less a knurled section?

km1125

I don't think it's a house hinge pin. I could use a better picture, but it looks like it's machined thinner in the middle. Household door hinge pins are the same diameter the whole length, with the exception of the knurl on one end.

It is more similar to the auto door hinge pin, but I think longer than any of those that I know.

Cobia 217

It's an alignment stud for his lower unit. Must have fallen out during disassembly. Pay up.