anti-siphon

[prawntrap]

I am planning to change the anti siphon valve on the top of the fuel tank.What do you reccomend to seal the threads of the new valve with before I re-install it.Also how tight should these things be screwed back on?

Thanks in advance..........PT

[SEAHORSE]

The best quality anti-siphon valve is the brass and stainless steel one avialable from Johnson-Evinrude Accessories.

On all fuel connections, use the teflon pipe dope and not the pipe thread tape.

[prawntrap]

thanks SH,
Do you apply the pipe dope to both the male and female threads?How much do you apply?Thanks

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prawntrap &raquo;</TD></TR><TR><TD CLASS="quote">thanks SH,
Do you apply the pipe dope to both the male and female threads?How much do you apply?Thanks</TD></TR></TABLE>

a little goes a long way, a small amount on the male threads.

[HydraSport205]

And the mother of all stupid questions, this is on the feed line correct? I am going to change mine out for good measure while I have the tank pulled.

[DoferGofer]

Yep, a little goes a long ways at my age.

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HydraSport205 &raquo;</TD></TR><TR><TD CLASS="quote">And the mother of all stupid questions, this is on the feed line correct? I am going to change mine out for good measure while I have the tank pulled.</TD></TR></TABLE>

Use the BRP #173274 anti-siphon valve for best results.

The valve is threaded onto the fuel tank pickup fitting elbow and the 3/8" Type A Coast Guard approved fuel line attaches to it with stainless steel clamps.

[prawntrap]

SH,
A tech. told me that the anti-siphon valve is not really a reqirement for an outboard.He recc. that if I suspected there might be a problem with the ones I have to just punch out the ball and spring.He said sometimes the restriction could cause the engine to smoke a little more and maybe down the road cause a vro/oms problem.Is he on the right track?

Pt

[SEAHORSE]

The "el cheapo" aluminum anti-siphon valves are very troublesome and sometimes do what the mechanic said. The BRP brass and stainless valves are a bit more expensive, about $11 apiece, and have never given problems over the years.

An anti-siphon is not Federally required it the boat fuel lines are aways above the top of the tank and if cut, would never fall below the tank top and start to siphon out fuel into the bilge. Safety and ABYC practices recommend use of an anti-siphon valve.

[prawntrap]

Always great info....thanks seahorse.Also on a slightly different topic.Does a 1997 johnson oceanrunner have the old style vro or the newer style oms? thanks

[SEAHORSE]

the older style OMS was used from about '92 to '97. From '84 to '91 was the VRO. 1998 had the redesigned OMS with replaceable fittings so 1 pump can be used on all motors and is completely repairable.

[prawntrap]

thanks SH