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  1. J

    Is it safe to replace the engine circulator pump in the water?

    Hi, I need to replace the engine's circulator pump (Not my raw water pump) on my Mercruiser 1998 5.7 engine. is it safe? I away check before working below the water line. Thanks
  2. J

    tracking down engine noise at front of the engine

    Hi, I am trying to track down noise at the front of my 1998 5.7 Searay, I have recently changed the belt tensioner, Raw water pump and the serpentine pulley with a new belt. My question is if I take the belt off and run the engine how long before I damage the raw water pump to see if something...
  3. J

    bow navigation wire runs through the railing… where does it come into the main section?

    The bow navigation wire runs through the railing… it’s a gray and black wire I’ve got a short somewhere in Navigation light wiring. Does anyone know the route the wires run from the bow to ???? Has anyone ever pulled new wiring?? 1998 Sea Ray Sundancer, 250 Thank you
  4. J

    Intermittent High Idle when warmed up...

    1998 TBI 5.7 EFI Mercruiser. I keep getting a high Idle around 1100 after running the boat. On start-up, I get the normal high idol when it warms up and drops down to 800, but after I am running the boat around and slow to dock it doesn't drop down, it stays up at 1100. I tried putting it to...
  5. J

    5.7 Mercruiser Delco distributor Shaft / Housing Exact spacing.

    I pulled the Distributor and dissembled the unit as required to remove/ replace the "internal Pic-Up coil:. But i guess did not clean the shaft and now there is a lot of Play, I can pull the rotor /shaft up and inch. The Engine Idle fine but i guess the shafter moved up under acceleration and...
  6. J

    knock sensor, brass Y-fitting for both the sensor and drain plug Cant find a part number

    The knock sensor has a brass Y-fitting for both the sensor and drain plug I need the Brass Y adapter I Can't find it or a part number. not sure if it's a Mercruiser part. 1998 5.7 Thanks
  7. J

    Pre-start system check Whistle not heard now Crank / no start

    Hi, 1998 Searay 5.7 Mercruiser. When I turn on the key u always hear the Fuel pump and a lihgt whistle ( not the Major Alarm ) but now the engine cranks fine. The electric fuel pump works. but no start. Checked fuses, Gear oil monitor Emergency shut-off. The Knox sensor is rusted and fall...
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