vacuums gage

[tjandoverguy]

i have a yanmar 4jh4ae where should i put put vacuum gage

[sailormed]

After the primary fuel filter for checking the health of your primary fuel filter.

[tjandoverguy]

I have a raycore and a filter on engine

[Lepke]

Gauge goes after the primary filter and before the lift pump. As the filter fills up, the vacuum rises. Actual numbers are different in most installations. Mine reads zero with a new 2 micron filter and I change the filter at 7"hg.

[jamhass]

If you haven't already, get one with a "drag pointer." This allows you to read the max vacuum without the engine running.

[tjandoverguy]

thanks for the comments i will see where i have room