Will this LNB work?

Read here https://www.njr.co.jp/e_frame/ef_05mc_02.html

The NJR2537 is an internal reference, phase lock loop PLL type.

The NJR2184 is a cheap DRO type.

The NJR2537 is a superior replacement, but if you are receiving a wide bandwidth QPSK outlink carrier, as is typical for a LinkStar system, you are unlikely to notice any difference.

The PLL type is needed when you are receiving a small carrier, such as SCPC, where the frequency error may mean you miss the carrier completely.  Also, small carriers and carriers with 8-PSK or 16-QAM modulation are more sensitive to phase noise and benefit from PLL type LNBs.  

Note that an external reference PLL LNB will not work unless the modem has a facility to send a 10 MHz reference up the LNB cable and has the reference turned on.

Best regards, Eric.