1988 24' Renken cruiser 5.7 mercruiser. Does anyone know where the pcv hoses out of the valve covers go? On my engine they just lie under the flame arrester, dont really attach to anything. Is this normal? Thanks guys.
Ya there put there so the fumes get sucked back into the motor and dont build up in the bilge and make a poof<br /><br />They should hook on to clips on the flame arrestor<br /><br /><br />tommays
Bill K.<br />On my Merc 5.7 there is a hose on the starboard side valve cover and goes to a fitting that looks like a PCV valve. That hose goes directly to the flame arrestor. On the port side valve cover there is a PCV Valve and it goes to a fitting under the carburetor. I have to take another look to be sure, but I know that the PCV hose does not go to the flame arrestor.
There should JUST be vent hoses hooked up to the valve covers Boats dont use PVC valves<br /><br />BUT people do stick them in for some reason ?<br /><br /><br />tommays
Thanks guy's, I'll take a look for the clips on the flame arrester. I have a bunch of funky looking stuff on this boat and am trying to sort it it out...
I just bought all of the tune up parts for a 2000 5.7L Mercruiser and the web site I used (stem to stern), listed the PCV Valve in the Mercruiser parts diagram. Item number 8 on the valve cover section, Mercruiser part number 21-861476.
The vacuum from PCV valve on a sealed engine helps prevent oil leaks. It is uncommon to find oil seepage and leaks on new cars since the manufacturers sealed the engines and and used the PCV valve to maintain a vacuum in the crankcase. It is a very good way to prevent oily bilges.
I am unfamiliar with later model Mercruiser engines. The late 80's vintage engine I use has what looks like a PCV. In reality it's empty, no disc or spring, you can look through it, as in hollow. Mercruiser wants $15 for it. Picked up a stock valve at a parts store, busted the guts out of it. Three dollars.