For Gawds Sake...................

[oldgit]

Just done an oil change on a pair of Yanmar diesels.
To speed to job up pumped out the old oil from both engines via dipstick holes before changing filters etc and refilling.
This left me with two dipsticks to reinsert to check levels in both engines.
The dipsticks are identical apart from the empty / full marks are different on each dipstick.
Why me ?

 

[Sailing steve]

Fill one engine with the correct amount of oil. See which of the two dipsticks shows the correct level. That's the right dipstick for that engine. Do the same on the other engine to double check.

 

[Porthandbuoy]

I reckon there are three dipsticks involved

If the engines are the same model is one for a generator and level, the other inclined to align with propshaft?

 

[Sandy]

This left me with two dipsticks to reinsert to check levels in both engines.

Did you mark what dipstick came out of what engine?

 

[Sea Change]

On some engines, part of the initial commissioning process is to fill the engine to the main and then max levels by measuring his much goes in, and you then mark the dipstick accordingly.
This is to account for the engine being fitted at a downward angle, which can interfere with the reading.
Admittedly, I can't explain why two engines would end up mounted at different angles in the same boat (assuming a cat).

 

[Boater Sam]

Different sump size or shape to miss an obstruction?

 

[ash2020]

Put them both in and run them hard. If one engine seizes, you'll know the dipsticks are the wrong way round!

 

[Thistle]

Do the dipsticks go directly into the block or into tubes attached to the block? If the latter, are the tubes the same length?