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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

    Thanks, turns out to be the Circulator pump.
  3. 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...
  4. J

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

    Thanks,1998 models were changed...
  5. J

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

    Yes, I see where it goes into the Stantion at the bow from inside the Anchor locker, I'm just seeing if anyone knows where it comes into the helm area, There is a Stantion before and one after the helm to check the wires there. Thanks
  6. J

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

    I wounder if there would there be any kind of wiring diagram that shows how the wires are ran through the boat? Thanks
  7. J

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

    I can’t see it without taking a bunch of things apart. Anyone actually see which stanchin the wires come from?
  8. 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
  9. J

    Intermittent High Idle when warmed up...

    I sprayed the throttlebody with cleaner… I ordered a gasket, so I’m going to take it off and get it from the other side…
  10. J

    Intermittent High Idle when warmed up...

    I was thinking about that… My boat doesn’t have the Schrader valve, so I’ll have to rig something up… Thanks
  11. 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...
  12. J

    5.7 Mercruiser Delco distributor Shaft / Housing Exact spacing.

    It turned out that I had a mix-matched rotor and Cap, Thanks all for your input.
  13. J

    5.7 Mercruiser Delco distributor Shaft / Housing Exact spacing.

    its become clearer? The Shaft assembly can't move. The Grear holds it in place. But the Flat portion housing Plate can move where the Cap sits on
  14. J

    5.7 Mercruiser Delco distributor Shaft / Housing Exact spacing.

    I did remove the pin...
  15. J

    5.7 Mercruiser Delco distributor Shaft / Housing Exact spacing.

    Thanks all: and It's the same distributor. Yes, I will be pulling the Distributor, just trying to get a heads up on what I screwed up... I do believe when I was hitting the top of the distributor with a large Socket to get room for the locking nut something slid down. now on the bottom, I can...
  16. 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...
  17. J

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

    The Y junction has the Knox sensor pointing straight into the block. Don’t know if that would make a difference?
  18. J

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

    The Knock Sensor has a different Thread ( fine) that blue drain plug. its $95 i think ill get a plug and take it out of the block and try to EZ out the rest of the knock sensor The boat is in the water so it adds a little stress to the work...
  19. 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
  20. 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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