Which oil for the gearbox?

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Chris

I changed the oil in the gearbox of my 321 after 120 hours. It was low and it was dark (needed changing). I used regular motor oil (same as I put in the crankcase). I read that you can use Dextron II (automatic transmission fluid) but the yanmar book said to use SAE30. Anyone have any experience with this?
 
B

Brian B321

Same here

The mechanics at my marina said use SAE - 30 - so I did - last fall
 
C

Carlos

Transmission oil depends on the type of transmission. It could be 10W30/SAE 30 or ATF. My transmision uses 10W30. Do not recall the model number at the moment. But my Yanmar is a 3GM30.
 
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joe n

transmission service bulletin

there is a service bulletin for some beneteau's with the prm transmission they have changed the fluid to atf. if you have a westerbeke engine go to their website for instructions and see service bulletin 239
 
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