Mercury 1987 50hp 3cyl - lower part mount thread sizes?

[nenivrot]

I stripped the thread in the bigger bolt in the tail end side of the lower mount.
The one that is bolted to the main body (upper part) of the engine body.

What is the thread size of that bolt?

Also if you have the thread sizes of the other mounting bolts, they would be appreciated: two in the front sides and one smaller one in the back.
Motor type in the title, sn: 9469317 (Belgian made).

 

[johnnygjr]

that information can be looked up on this site,under engine diagrams

 

[nenivrot]

Thank you, I thought I had gone through the diagrams but looks like not carefully enough.

I found the thread sizes for the one small pin in the back (3/8") and the two in the sides (7/16") but the big one in the back that I stripped I didn't find.
It is the item 4 in http://www.marineengine.com/parts/m...veshaft-housing-long-0c160936-up-60el-noi-npt
Part id is: 16-57935 and only describes as: Stud, driveshaft housing (3"). The thread size for this I would like to know.

 

[Fun Times]

The nut sizes to those two studs are listed in another area of the parts catalog, they look to be item numbers 77 and 79 in the Prop shaft housing, http://www.marineengine.com/parts/m...thru-9683054-bel/gear-housing-propeller-shaft

 

[fastjeff]

5/16 coarse?

Jeff

 

[nenivrot]

Thank you boat_tech, per linked diagram the bigger one was the same as the two side bolts: 0.437" (7/16") and the pin is 3" long.
All 3 mount bolt types now clear for me