I'm with mcollinstn,
I spend enough time and effort to avoid getting in trouble/sued over stupid things other people do. I dont need to add ANY stupid thing that I actually do to it.
Gary

Great input guys! I'll check out what IMCO has.

HP,

No I haven't had two fires in boats, I've had THREE fires. Two were inmy boats, one in a friend's. One was a cheap failed bronze tee in the fuel system on one of my houseboats that would have resulted in a total loss, had the A/S devices not been installed. One was a backfire into an automotive "weiand style" triangular foam air filter that caught fire and burned the rubber fuel line off the motor - where the flames came out the bilge blower vents. The friend's was due to an electrical short. All 3 fires were in the engine compartments. All 3 fires burned through fuel lines. And all 3 fires took more than one extinguisher to knock them out.

The air filter fire would have been a killer, if we hadn't had the sense to NOT open the hatch. We crammed beach towels in the bilge vents and then cracked the hatch open just far enough to blast one full extinguisher into it, then opened it and finished it off with the second extinguisher.

You seem to be of the opinion that braided hoses are indestructible, but they are NOT. Old ones crack. Hot ones melt. Sure, they're better. Not foolproof.

All I can do is give my opinions. If you want to replace your fuel system with paper sacks and plastic straws, then be my guest.

I'll still stop to help if I see you on fire...

And I'll stop to help Kokopelli when he starves his Whippled 496 and grenades it. Peace man...HP out.

There must be larger anti-siphon devices out there. How does Merc. deal with the problem on their big HP motors? What about all those 1000 and 1200 hp Sterlings out there. If they all only had 3/8" check balls we would be hearing about alot of motors running lean and blowing.

MY suggestion is that Kokopelli be hereby assigned the duty of calling two big boat builders, lets say Cigarette and Fountain and ask their rigging deptments what they do for check valves on their boats with big HP motors and then report back to us all on this thread.
Swords at rest gentleman!
Raylar

Check with your Aeroquip dealer. They subcontract to goodrich (in England) for large check valves. Not sure if they are the spring ball verison.

BTW be prepared to pay; size 12AN is 225 bucks

Yes, there are larger ones.
Ever seen the fuel lines for a 2000 hp diesel?

They are big.


Here's a high flow Nascar unit:
ASV08 - NASCAR 1/2” Fuel Line Anti-siphon Check Valve

USCG regulations require EITHER

a spring loaded anti-siphon

OR

an electric shutoff solenoid valve.

Choose your poison.

FYI, Insurance claims due to fire are much more heavily scutinized than others. Probably because of the possibility of arson. I know of 2 boat fires (non injury) that were investigated for months.