I'm a relatively new boat owner and A4 ("new" model) enthusiast. I attended last winter's seminar in Chestertown weeks after purchasing my Columbia 8.3 and let most of the discussion fly right over my head. In my sophmore sailing season I'm finally figuring some things out but there's always more to learn.
I've just been reading some posts and came across a few references to water "batching" out of the exhaust. Specifically, you clarify that while the water will batch at idle it should flow continuously at cruising speed. I believe the water batches out at all times.
I'm wondering whether this is related to another problem I'm having, which is that the temp. never exceeds 120. When I got the boat last year it was overheating. I determined that the screw holding on the cam shoe was a replacement that was set in too far and gouging the impeller blades. I installed the parts from a service kit as well as a new thermostat (which I've tested through a double boiler on the stove to determine it is accurate) and it hasn't been above 120 since. I believe the "problem" is that the cam shoe is so thick it causes extra "thrust" if you will of water (though I may be totally off base). I attempted to reinstall the old cam shoe but could never find a screw that was appropriately sized and that did not result in water leaking through the screw hole (even when I applied liquid gasket).
I guess this long-winded description leaves me with several obvious questions: (1) What should I look for as the source of the batching exhaust? (2) How concerned should I be with the water temp.? Other than buy a new water pump (which makes my wallet cringe this time of year) is there anything specific I should do?
Thanks!
I've just been reading some posts and came across a few references to water "batching" out of the exhaust. Specifically, you clarify that while the water will batch at idle it should flow continuously at cruising speed. I believe the water batches out at all times.
I'm wondering whether this is related to another problem I'm having, which is that the temp. never exceeds 120. When I got the boat last year it was overheating. I determined that the screw holding on the cam shoe was a replacement that was set in too far and gouging the impeller blades. I installed the parts from a service kit as well as a new thermostat (which I've tested through a double boiler on the stove to determine it is accurate) and it hasn't been above 120 since. I believe the "problem" is that the cam shoe is so thick it causes extra "thrust" if you will of water (though I may be totally off base). I attempted to reinstall the old cam shoe but could never find a screw that was appropriately sized and that did not result in water leaking through the screw hole (even when I applied liquid gasket).
I guess this long-winded description leaves me with several obvious questions: (1) What should I look for as the source of the batching exhaust? (2) How concerned should I be with the water temp.? Other than buy a new water pump (which makes my wallet cringe this time of year) is there anything specific I should do?
Thanks!
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