mercury 350 mag

[timstu]

first Yes i need to get a manual,But today out on the water my lower left side pully came off.My question is is that to the water pump?I manage to push it back in and put belt back on to get it back on the trailer. Can anyone tell me what that pully is too? Thanks

[www.stvowners.com]

Can you post a picture along with the year of the engine?