I didn’t realize it but when I bought my fuel pressure gauge I accidentally bought a mechanical gauge. I am not sure I feel comfortable running a line all the way to the dash that is full of pressurized fuel….

i wouldnt do it. Not Coast Guard approved and a easy out for your insurance company.

i have a older obsession cat twin set up. had mec. pressure gagues installed from the factory. as i was redoing the boat i thought about removing them because of the fuel lined running to the helm. but after taking it apart for painting and seeing the uscg approved 1/4 inch fuel line i could not see how it could ever leak. it has a1/4 id. and about a 5/8 or better od. so i reinstalled them. kind of like knowing what is on the gauge is what press i have.just my 0.02$

I have a hard time believing that it would not be coast guard approved considering it is made by the leading marine gauge manufacturer, livorsi. but I could be wrong. gerg, is it a rubber line you have?

My old boat had rubber lines running to the dash and they leaked around the fittings on the back of the gauge. I was very lucky nothing happened. I ended up putting new gauges on the fuel regulators to check pressure. Not as handy as being on the dash but safer. Personally I would use electric senders if you want to use your dash gauges.

I'm in the process of re doing my dash and I'm adding a mechanical fuel pressure gauge on the dash. I have access to a hydraulic line shop and I'm getting a stainless nylon wrapped 3/16" line made with 3,000psi crimped ends on it. I'm going to take my chances if it leaks and burns my boat down ill be first to say I was an idiot. Lol I say if you're careful with routing and make sure fittings are properly installed go for it.

I guess since the fuel line could leak and the boat could catch on fire I'm going to have to disconnect the fuel lines from the tank to the motor. I don't think the insurance company would understand if there was a fire caused by a fuel leak. Has anyone ever attempted to put a sail on a performance boat? I guess that's what I'm gonna have to do so I can get around. Can't have fuel in a fuel line running through the boat...

The only thing with a mechanical gauge is if you are running a mechanical pump the gauge will bounce when the motor is idling. Other than that a mechanical gauge is the way to go.

yes it was rubber line. the fitting on the back of the gauge and at the fuel line t were pushlok fittings that don't need clamping but were i assume for extra piece of mind. once you push the hose on you have to cut it to get it off. good luck.

There's quite a few wires back behind the dash don't you think? I guess it depends on your motor as far as fuel pressure gauges. If your running big ci blown motors it more important to monitor than a stock 454.