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plastic plugs in cooling raw water

F

fst

New member
1997 Proline 211 has GM 260 5.7. there are 5 plastic plugs, four blue with pipe thread and one white with what look like fine bolt thread. Two go on the right, or starboard side (forward of starter) and three on the left. The threads on these plugs are worn and I have never been able to tell where the white one is supposed to fit they will all hold and are difficult to reach and worse to see. No doubt before i got this boat they were forced. Thanks
 
After a slip and fall (while in the slip, engine off) and having my big foot hit and break one of these, dumping anti-freeze ( FWC engine, but same plugs), I replaced them all with brass pipe plugs, available at any good hardware store. IF raw water cooled in salt water, I'd try to find bronze plugs.
 
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