Thermostat question.

[MechanicMike]

I stopped in at my local Yamaha dealer to pick up some maintenance items to get the boat ready for the season. I noticed that when i got home the thermostats i bought had 2 different part numbers . One box was a
6H3-12411-11. The other Was 6E5-12411-02. Not sure which one is right one for my application or if i should just be worried about the 12411. The parts guy is new and seemed to be struggling a bit. The motor is a 2000 ox66 150. SX150TXRY. Any info is much appreciated

Thanks Mike

[jb123]

7 6e5-12411-20-00
thermostat
$23.40 2

look up your motor, here, crankcase 2