Rubber O ring -thermostat

[MY911S]

There appears to still be a trickle of oil from the thermostat even after replacing the rubber o -ring. Motor is a 73RS MFI type. Should I try another O ring? Any ideas or first hand experience appreciated. Thanks!

[db_cooper]

I've had the same problem..if you are talking about the thermostat on the top of the engine case.

Our host sells two, one green and one red.

I used a green "O" ring and the thermostat glided in with no effort..and it leaked oil.

I used the red "O"ring..the thermostat took some mild effort to install..(lubed of course) and has not leaked a drop of oil.

Same part numbers..different results.

[MY911S]

Thanks.... Hmmm I used the red too. Maybe ill just buy a new ring and give it another go.

[K Sykes]

Might try a bit of Curil-t on the o-ring

[db_cooper]

I would try another "O" ring different color. I would not use any sealer. They don't leak with a good "O" ring in them.

[db_cooper]

Went back through my log..the RED "O" ring was the oil leaker..the GREEN "O" ring worked..sorry I got it backwards. Use 999-707-314-40-M17 GREEN

[MY911S]

ahh...thanks ill order the green