I'm going to attempt to translate. The bottom bolt is rusty and he would like to replace it. Why are there numbers on the bolts and what do they mean?
Answer: I believe the number "7" on the bolt refers to the grade, or strength of the bolt. Find another bolt with the same marking. Or you can go to the Tohatsu dealer and order the same bolt. It is really nice that the torque numbers are written on the intake manifold.
Very swift reply. Thanks a lot. If it is the "breech head", I prefer to not open it. Anyway, can you give the name of a trustful Tohatsu dealer on internet ?I'm going to attempt to translate. The bottom bolt is rusty and he would like to replace it. Why are there numbers on the bolts and what do they mean?
Answer: I believe the number "7" on the bolt refers to the grade, or strength of the bolt. Find another bolt with the same marking. Or you can go to the Tohatsu dealer and order the same bolt. It is really nice that the torque numbers are written on the intake manifold.
No I'm sure it is rusty, I put some white fat on it. By now it is not so important, you are right.I would not worry about the bolt unless it bothers you.
the bolt looks to be stainless and simply have sealant on it.