Re: Rubber Exhaust tube burnt up
how much water should come out of the manifold. Nothing but a fine mist for the most part, but rev the motor and it seems to go away almost. Doesn't seem to run very well with the boot off either, might should have covered the coil. Other than that doesn't seem like alot of water. Ill try it with the stbd side off and see if more water comes out on that side next.
There should be a LOT of water. Disconnect the hose from the transom, start the engine and run it (briefly) with hose disconnected.
There should be a LOT of flow. Whatever amount of water comes out of that hose (assuming a good impeller, and no restrictions up to that point) should be split between the 2 risers coming out with the exhaust when you remove the rubber couplings.
Look at it this way: Rubber and other NON-metal parts will burn with the heat of the exhaust. When you add water to the exhaust, it keeps the temp of the "mixture" below 212*F (100*C) or so.
You clearly have a restriction/blockage someplace in the raw water circuit.
If your manifolds and/or risers are clogged(with rust) you MUST replace them. (they cannot be safely "cleaned")
If only one side is clogged, I would still replace both.
ALL the raw water flow from the raw-pump, (eventually) goes through and exits out the exhaust manifolds AND risers. There's usually enough "flow" such that you can put your hand on them (and not get "burned') while the engine is running It should be approximately equal on both sides......but it's not uncommon for one side to be a little warmer than the other.......
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