No fuel pressure on my 2001 polaris verage 1200 tx

This question also edited for clarity and add maker.
This question moved to RVs category.

'Rescorla' is a great Cornish name and reminds me of Rick Rescorla when I see it. I moved to Canada from Cornwall.

https://www.google.com/search?q=1984+fleetwood+southwind+motorhome++oil+pressure+cut+off+switch

Yes, you have two fuel pumps

One in the tank and a second one on the right (passengers ) side of the front of the engine.

Southwind Fuel Pump - Where is it? - RV.Net Open Roads Forum

More here

https://www.google.com/search?q=1984+fleetwood+southwind+motorhome+fuel+pumps+location

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If your 1976 Dodge F40 Sportmann RV starts up only when you put gas directly in the carburetor, there might be an issue with the fuel delivery system. Here are a few things you can check:

1. Fuel Pump: Check if the fuel pump is working correctly. Listen for a buzzing sound when you turn the key on (without starting the engine). If you don't hear anything, the fuel pump might be faulty, or there might be a problem with the electrical connection.
2. Fuel Filter: Check if the fuel filter is clogged. If it's been a while since you replaced the filter, it might be clogged with debris, preventing the fuel from reaching the carburetor.
3. Carburetor: If the fuel pump and filter are working correctly, the issue might be with the carburetor. Check if the carburetor is dirty or clogged with debris. You may need to clean or rebuild the carburetor.
4. Ignition System: If the ignition system is not working correctly, it might not be providing enough spark to ignite the fuel in the engine. Check the spark plugs, spark plug wires, and distributor to ensure they are in good condition and functioning correctly.

If you're not comfortable checking these components yourself, it might be best to take your RV to a qualified mechanic for diagnosis and repair.

no lights means no cluster warning lamps glow for errors PCM.
no engine told at all.

• surging:
• bad fuel, old or contaminated or sabotage (global worming punks)
• lean fuel mixture , low fuel pressure, injector 1/2 cogged ,
• filters any or all clogged (fuel/air)
• map for MAF sensors messed up.
• EGR valve stuck open or leaking. to much.
• cats half melted.
• engine (mech) problems
• huge vacuum leaks to intake man.

Question edited for clarity and spelling 'Oman (the country) to Onan.
Question moved to RVs, guessing this is an RV Generator?

Troubleshooting

https://www.google.com/search?q=onan+5500+generator+troubleshooting

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https://www.motorhome.com/tech/rv-tech-questions/rv-clinic-rv-cranks-but-wont-start-intermittently/

This video may help. First you must see if it is a fuel problem or an electrical problem. Spray a little starter fluid into the throttle body and see if it starts. If it does, check fuel system pressure. If no pressure check fuel pump for operation. If it still does not start then there is an electrical problem which could be anything from a module to a fuse.

That could be low fuel pressure, plugged fuel filter. Also clean the throttle body. Youtube videos will show how to clean that.

run the fault codes to determine what has failed

Contact your local retailer/service center directly or online here: HOW CAN WE HELP YOU

Try this:

http://www.polaris.com/en-us/company/help

When was last service? Fuel pressure tested? Has this unit been stored, or running good up until this point?