Not my business

1. You can't tell customer it's not my business. May need to tell them this desk isn't relevantly to the subject that you are concern. 

2. I may not leave job at the moment. 

3. Can't tell colleague I don't agree with you. May need to say I bag to differ.

NSR150SP Telltale hold leakage

IIf you found some oil leakage form telltale hole, the mechanical seal and pump shift may damaged or rusted. 

Refer tin above two picture, the mechanical seal has broken and include many rust, the pump shore rusted also. That is, the engine oil will leakage form telltal hole. 

How to fix it?

Change mechinal seal, oil seal, bearing, and pump shift.

The oil will not leakage again