Join Date: Jan 2008
Location: Seal Harbor, Maine
Thanked 21 Times in 20 Posts
Rep Power: 10
The advice I get from Moyer Marine is to wait because if someone doesn't understand the way a wl muffler might back water up into the exhaust manifold if there is a prolonged delay in the engine firing it could damage the engine. If the engine does not start and the operator continues to turn it over with the battery it fills the wl muffler with cooling water being pumped by the engine's starter motor turning the water pump. If the water level reaches the height of the hot pipe's turn down to the muffler it will flow back into the engine. Running down a battery with a hard starting A-4 is a recipe for disaster. The real solution is to keep it running well. I do as do you. In any event, I have to open the rw valve either just before starting my engine or just after it starts. Since I have a wet impeller anyway and now have a handy way of opening the valve without crawling down into the engine space, I wait. I used to have to crawl down and shut it before leaving the boat. Not any more! Yippee! That is just my personal rule with all thru hulls.
Last edited by downeast450; 09-21-2011 at 08:59 AM.