Originally Posted by smokie
What is Post Immersion Restart System and were can I get more information?
The PIRS system is a Barrus Mod all done by us at work. There are two systems either the normal PIRS Which is simply drain taps to allow water to get out of the fuel system. With this version you have to take the lid off take the plugs out, pull the engine over put new plugs in and re start the engine.
The New Fast PIRS all you do is pull a leaver which opens valves in the head and crankcase and fuel system, Then either pull the engine over or turn the engine over on the starter which purges all the water. Then close the lever and off you go. I can get and engine re started in about 25 seconds with this system. Its in use with the RNLI on all the D class boats and the Y class. The MOD use it too. We have to fit tilt switches and water proof all of the electrics. The MOD version has to be able to be submerged for anything upto a month and still start. I did all the trials for both systems which was great! using a brand new 25hp Outboard as an Anchor for a month!!!.
The RNLI's Own system stops the water getting in to the engine which is very good but on older engines the seals dont always keep the water out!.