Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: will this sender work on a 5.7 mercruiser engine
Document: This a good bargain if you are looking for an oil pressure sender to work with a marine engine without spending a fortune for one.
Purchased this Teleflex-Sierra 18-5899 Oil Pressure Sender to replace original sender unit on my inboard's Indmar Monsoon 325 engine. Installing this sender fixed issue of erratic readings from oil pressure gauge when engine was at idle or running at low RPMs.Considerably cheaper than buying from boat dealer and seems to work perfectly.
These senders are really Sierra I think. They are well built and dependable. Make sure the range is right for your gauge. Also it's important NOT to use any type of sealer on the threads. That's why the threaded part is brass. All senders like this work on a increasing connection to ground. The higher the pressure the more the sender grounds the sensor wire. If the base of the sender isn't grounded solidly to the motor it may give false low readings or be erratic. Esp.
Great replacement and works well. Very easy to install and works perfectly on my 2000 Malibu Wakesetter LSV with the 325HP Indmar engine.
I had to do a little cross referencing to be sure this unit was a match for my 305ci Crusader engine. I would have preferred a bit more info. They do provide their #18-5899 which does cross reference to my original part # for confirmation.
The brass is soft and will create it's own seal. Also if you have dual steering stations you'll need a sensor that can hook to 2 gauges. To test your gauge just ground the sensor wire for a moment. It should peg the gauge to the high side.
Got this for the boat, I wrapped some teflon tape on the threads and twisted it tight... I got a ground from the case with a hose clamp around it....due to the fact that on my boat, there is a rubber hose that allows me to raise this to a better spot away from bilge water and corrosion. Have not tried with my meter but will update if there is a problem.
Answer: yes