Where is the fuel shut off valve on my 1984 Newport Mark iii?? (Universal M25 xp engine)

Dec 4, 2024
20
Newport 30 mark III Port Angeles
I want to change my fuel filters but can't figure out where the shut off valve is and can't find it in the owners manual. The manual just says there is one. But not where.
 
Mar 6, 2008
1,356
Catalina 1999 C36 MKII #1787 Coyote Point Marina, CA.
Follow back the fuel feed line back to the fuel tank, you will find it on the top of the tank near the fuel gauge. You may have to open access port in the cockpit lazarette or panels in birth near the fuel tank.
 
Sep 24, 2018
3,438
Catalina 30 MKIII Chicago
Joe is right about it likely being on top of your tank. On my C30, you prime it by holding the key in the start position without pressing the start button
 
Jan 7, 2011
5,659
Oday 322 East Chicago, IN
Same location on my O’Day 322. Just off the tank (which on my boat is under the floor in the lazzarette. I can just reach the shut off valve through a hole cut in the ply wood floor.


Greg
 
Dec 4, 2024
20
Newport 30 mark III Port Angeles
I did look there, although I didnt crawl over the tank to check the aft end. Is that where it is? Or is it on the side (near where our Raycor is and where there is a cutout)?
 
Jan 7, 2011
5,659
Oday 322 East Chicago, IN
I did look there, although I didnt crawl over the tank to check the aft end. Is that where it is? Or is it on the side (near where our Raycor is and where there is a cutout)?
You really need to trace the fuel line…start at the Racor and trace the line back to the tank. The fuel shutoff should be somewhere between those 2 points.

My guess would be close to where the fuel line leaves the tank.


Greg
 
Dec 4, 2024
20
Newport 30 mark III Port Angeles
There is no way to trace it beyond a certain point when it enters the cut out by the raycor. I could tie a flashlight and gopro to a rat to explore, or maybe an endoscopy camera :). But they sure didnt put it somewhere someone could actually access it.
 
Jan 7, 2011
5,659
Oday 322 East Chicago, IN
There is no way to trace it beyond a certain point when it enters the cut out by the raycor. I could tie a flashlight and gopro to a rat to explore, or maybe an endoscopy camera :). But they sure didnt put it somewhere someone could actually access it.
It should be in an accessible spot…. Not right after (or on) the tank? I would have guessed it would be between the tank and the Racor.

What is on the “other side “ of whatever it disappears into? Can you get to that side?

Greg
 
Mar 6, 2008
1,356
Catalina 1999 C36 MKII #1787 Coyote Point Marina, CA.
This fuel line was installed after the hull was formed. I believe you should be able to follow the hose without cutting an access opening.