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#1
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Silent Exhaust on Mercruiser 502 Mag
I have a 2000 twin engine Baja 342 with Mercruiser 502 Mag MPI
engines. I noticed yesterday the silent exhaust is not working on the port engine (both sides). Works fine on the other engine. Both are controlled by a single switch on the dash. When we bought the boat, the dealer made a big deal out of saying not to flip this switch when RPMs where higher then 1500 or so. That was fine till my wife asked me what that switch did and flipped it at the same time going 2500 to 3000 RPMs. Not sure thats what caused this problem on the port engine but its a good guess. Can someone tell me if this is something easy to fix (fuse, I hope) or do I need to call service? thx George |
#2
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Silent Exhaust on Mercruiser 502 Mag
I've never heard of the engine speed having anything to do with the silent
choice exhaust. They are just Y connectors with flaps in them. Most are big electric solenoids but there are also hydralic ones. The corsa ones are solenoids, I believe the merc silent choice are also solenoids. I flip my corsa ones on at WOT all the time. Sounds like an bad connection or relay. They often have one or more relays because the electrical load is too big for a dash switch. "George" wrote in message om... I have a 2000 twin engine Baja 342 with Mercruiser 502 Mag MPI engines. I noticed yesterday the silent exhaust is not working on the port engine (both sides). Works fine on the other engine. Both are controlled by a single switch on the dash. When we bought the boat, the dealer made a big deal out of saying not to flip this switch when RPMs where higher then 1500 or so. That was fine till my wife asked me what that switch did and flipped it at the same time going 2500 to 3000 RPMs. Not sure thats what caused this problem on the port engine but its a good guess. Can someone tell me if this is something easy to fix (fuse, I hope) or do I need to call service? thx George |
#3
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Silent Exhaust on Mercruiser 502 Mag
On Mon, 14 Jun 2004 22:58:16 GMT, "JamesgangNC"
wrote: I've never heard of the engine speed having anything to do with the silent choice exhaust. They are just Y connectors with flaps in them. Most are big electric solenoids but there are also hydralic ones. The corsa ones are solenoids, I believe the merc silent choice are also solenoids. I flip my corsa ones on at WOT all the time. Sounds like an bad connection or relay. They often have one or more relays because the electrical load is too big for a dash switch. Thru-hull exhaust is *required* for the Mercruiser 454 and 502 Mag motors. Under 2000 rpm, you're fine thru the prop, but above you have to switch to thru hull. You could probably get away with higher rpms thru prop, but definitelly not WOT. If you do, you lose not only performance, but risk engine damage. I hope you've got something less than a 454 Mag? That said, i don't think flipping the exhaust at higher rpms should cause damage to diverters themselves. Check the relays like the above poster said. |
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