Replacement fuel lift pump question

[Kyle Ewing]

Short question:  I replaced my fuel lift pump with the Napa 610-1051 and now my fuel and temperature guages bounce very slightly with the new pump.  Is this normal or do I have a problem with the ground?

Long explanation:  I was checking filters after a loss in RPM--A drop from 2500 to 2000 after motoring 7+ hours, it corrected after backing throttle to idle.  I checked the Racor and drained the bowl but it was clean.  When I turned the key to start the engine there was no clicking from the fuel pump. 

While checking voltage the pump came back to life.  I went ahead and got a spare pump just in case (Napa 610-1051 as described here, http://c34.org/bbs/index.php?topic=2515.0).  The next day (today) we motor sailed for another 7+ hours.  All worked with no RPM drop, however the fuel pump wasn't clicking.  It had voltage so I replaced it.

The new pump doesn't click like the old, rather "rumbles" so I'll take the slight guage bounce as indication it works.  What are other experiences?

Again, THANK YOU to all who contribute to the body of knowledge on this board.  I'm much more confident knowning that just about anything I'll encounter has been discussed here.  In this case, I searched raplacement fuel lift pump on my Blackberry and texted the part number to a friend who picked it up for me.

FYI, someone mentioned the Napa 610-1051 isn't available.  My friend found it and it matches Stu's picture.  There's also a Napa 610-1050 which is a higher pressure version of the same pump.

[Lance Jones]

As the rpm is alternator driven, is it possible that your rpm srop was due to a more charged battery bank?

[Ron Hill]

Guys : If you don't hear the clicking of the electric fuel pump and it has 12v power to it - put you fingers on the pump and you can usually "feel" that it's working.