Thanks for your response. The plumbing is like most, Pump.. "T".. Logs.. Motor.. Out thermostat area.. to the Snails. I does not have any restriction device, so I just purchased the relief valve and a thermostat kit from a competitor (sorry I did not know of you at the time, won't happen again).
The water comes from the therm housing to front of the snails. There is a plug in the back (transom side) of the snails. I thought water going out would go there as not to get back into the heads?
The first location where yours is will make the water go all the way around snail before meeting exhaust from engine at end of tip. If you put it at the end "tip side" the flow will just dump out and will not make the flow around as well or not at all. There should be a wall between the two.
The snail is double walled like the log. Where the snail and log meet is blocked off by gasket. The snail isn't double walled at the flange. I see you have a olds...important to keep the water flow at 180 degrees or lower pressure. Had an olds and water valve was opened all the way once and made it about a mile before water cracked head around valve.
So it is correct? Is it to help cool the Snail by going up around and out? Water will not get back into the valves?
Here's my experience with snails & water coming in the open exhaust valves. I didn't have flappers, 1st mistake, I came in a little fast to shore and cut the engine, 2nd mistake. Water rushed in due to no flappers and washed over the snail allowing water into open exhaust valves causing a milkshake.
My lesson learned was to check my flappers & not shut off while moving fast.
Plumb it like Tom says, I think he may even have a diagram on his site & krusn56 has good advice too
"The plumbing is like most, Pump.. "T".. Logs.. Motor.. Out thermostat area.. to the Snails"
" I just purchased the relief valve and a thermostat kit"
Your current method sounds correct, but will change somewhat when you install and replumb with the thermostat kit The Snails (risers) always get the water last as said they are jacketed and have an opening towards the top of the hump to dump the water to the tips Tom
this is a diagram from Rex that will give you an idea of how your plubing will change ..