Replace Screw for Yanmar 2GM20

[ga1135]

Some of the screws for the engine are being rusted and need replacement. Should I use S/S screw or Tin coated Iron screw for replacement ?

Tin Iron screw seems would rust soon and need replacement again shortly.
S/S screw seems last longer but I worry that it will end up corrode the engine body instead.

Appreciate your helpful ideas.

 

[Tranona]

Replace with proper Yanmar screws as they have an inbuilt washer. Unlikely the corrosion has affected the screw itself - it is the heads that suffer. I gave my replacement ones an extra spray of Yanmar grey paint.

 

[SONNY494]

Here is an email forum I found to be helpful regarding Yanmar engines. http://groups.yahoo.com/group/Yanmardiesel/

Sonny