Racor filter selection

[vpbarkley]

I want to add a 30 micron Racor with a sight glass as the primary fuel filter.
The engine is a 4JH4AE Yanmar 53 HP diesel engine mfg. in 2008.
The engine has two fuel filters currently.
The primary filter of unknown micron rating would be replaced with the Racor.
The secondary filter, Yanmar 119802-55810 has a 10 micron rating.

Which model filter housing should I choose for this engine size?

If you have some experience with selection and application these filters please chime in. Thank you.

[Uncle Bob]

Racor 500, or the chinese knockoff. 30 micron primary filter.