I recently purchased a new Yamaha 2.5 hp outboard
for my dinghy
. It has a sight glass for viewing the engine oil
level, but for the life of me I cannot determine what I'm supposed to be seeing through the sight glass to gauge the correct oil
level. The user's manual is not helpful to me.
So my question is, if I use the dip stick that is attached to the filler tube cap to measure the oil level, should the dip stick be read after
a) Screwing the cap with the dip stick back in place?
b) Just inserting the cap with the dip stick until it rests on top of the threads?
Method (a) gives a reading that is about 1/2 inch higher than method (b).
I cannot find anything in the users manual about which method gives the right reading.
Thanks for any help.