View Full Version : Please help me identify this picture

07-01-2012, 02:49 PM

I know this has fuel running through it, I expect it is some type of filter. I have done a search but not able to identify this or what maintenence it requires.

It is on my 1989 Prostar 190 - Indmar 351.


07-01-2012, 02:53 PM
Fuel & water seporater

07-01-2012, 03:22 PM
Racor 110 fuel /water separator......filter inside should be replaced yearly or every 50 hours. looks like you need some new fuel line also....just replaced mine this year...be sure to buy the ethanol resistant type. The inside gets attacked by the ethanol and causes it to degrade. I ran mine all the way from the tank to the separator then to the fuel pump...cheap and easy job. You can get all the stuff at Skidim.com.

07-01-2012, 04:22 PM
Thank you both for the information, looks like my next project!

07-01-2012, 04:51 PM
They sure picked a poor place to mount it crowded among wire harnesses.
These are great to have - draining them regularly to see samples of water/rust.

01-19-2015, 07:17 PM
Sorry to bump an old thread, but how do you get inside this to the filter? Does the bottom assembly spin off or what?

What's the procedure for wanting to replace this filter?? I have this same one on my 89 ps190 and I'm also wondering where the other filter might be

01-19-2015, 08:39 PM
no problem - THREAD REVIVAL ---- :) :D


01-23-2015, 05:29 AM

The water separator filter in the photo that started this thread gets removed by loosening the big bolt on the top center of the housing. Might take a 1" wrench or similar. The bolt threads are inside the housing; that's not an external screw off housing like you'd think from an oil filter change.

If I recall correctly, the other small fuel filter is on the fuel line about 1' before the carburetor. If you open the engine cover, sit on the passenger seat with the pylon centered between your feet, it'll be just above your right foot. The housing is painted the same black color as the engine. The actual filter is about 1" in diameter and 1 1/2" tall. Set screw at the bottom of the filter housing to loosen and remove the metal strap holding the housing tight.

I believe I got my replacement filters from NAPA, though there are other sources. My box of parts and filters went with the boat when I sold it, so don't know that I have the part #'s around. A search on this board may find them.

[Note: This is from my recollection. I sold my '89 a few years ago.]


02-08-2015, 07:34 PM
Racor 110 ,you do just loosen the big nut on top and then you spin the bottom housing off. it does spin off like an oil filter and inside lower housing that falls free will be the filter

as for the small filter bongo is talking about, it is located in the bottom of the fuel pump .filter and spring inside of the fuel pump , follow his instruction for removal of the small one
small filter wix 33943 napa 3943

,,,small filter

04-11-2016, 11:50 AM
Been a while since visiting the Mastercraft site, but wanted to say thanks to all that put such great info on here.
Been needing to replace my filter forever and found what I needed right away!

04-12-2016, 09:24 PM
cool i will add another pic showing both the filters and a
Fram part number for the small fuel pump filter .

fuel pump filter Fram #CG7 ,pic of Fram box and Napa box

Racor filter and Napa filter ,