"A fuel pressure test is easy
"A fuel pressure test is easy and the gauge isn't very expensive. Look on the fuel line for what looks like a tire valve. That's where the gauge attaches and you would need to make sure it's tight before turning the key to ON.
If you have an Advanced Auto Parts store, go there and borrow one- they loan tools. Tell them you need one with a Shrader valve. Also, since the gauge should have a bleeder on it (gets rid of air in the gauge), you should take a clean, clear bottle with you so you can take a fuel sample. It's the perfect time to do that.
If there are two lines attached to the throttle body, your pressure should be about 30 psi unless someone can indicate otherwise, as stated in a V-P manual. I would defer to the manual on this but on an Indmar TBI (which is really the same motor), it's about 30 psi.
When you turn the key ON, listen to a 2 second buzzing sound. If you hear nothing, check your safety switch and lanyard, or the fuel pump relay and fuse. They're clearly marked on the motor."