Trim Pump

[tech62571]

2006 1800MX 3.0

the other day my trim wouldn't go down.
Up worked no problem.
after trying it about 20 times it finally started working.

I thought I might just replace the pump and solenoids but
im having trouble identifying the pump so I can get parts.

it has SAE J1171 Marine on it

I looked at the mercury parts catalog but there are a lot of them

any ideas on how to know which one I have?

I attached pics