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  1. Scott06

    Pooched fuel pump.... need replacement options

    Look up the merc wiring diagram on my boat they run in parallel 12 off the starter when cranking then when in run it comes off the 12v + to coil (purple) through the oil pressure switch to power the fuel pump. If you search these forums you will see threads showing diagrams and commonly...
  2. Scott06

    Cooling engine - direct water hookup

    Oh if outdrive is off jam the hose in the water passage where drive meets bellhousing. You can cut an old washing machine hose in half fits in pretty good. hold it with a bungee etc this will keep raw water pump lubed up and primed. You can turn the water on before it runs, i usually turn the...
  3. Scott06

    Pooched fuel pump.... need replacement options

    if you google the part number you find a number of replacements for the OEM part, which has been superceeded by 8623A5.. https://www.google.com/search?q=mercruiser+86234A4&rlz=1C1GCEU_enUS915US918&oq=mercruiser+86234A4&aqs=chrome..69i57.4802j1j15&sourceid=chrome&ie=UTF-8 nothing wrong with a...
  4. Scott06

    Cooling engine - direct water hookup

    By bypassing the impeller it you will burn it up unless its not turning ....it needs water supplied to it unless disconnected by removing the drive ( alpha in drive impeller or removing the belt in a bravo set up ) Large hose on right hand side of the thermostat housing is the cold water in...
  5. Scott06

    Mercruiser 5.0 Won’t Reach Operating Temp

    As a sanity check - Have you verified the 120 is indeed accurate with an IR thermometer also the OEM merc thermostat gasket has rivets in it to ensure the housing sensor is properly grounded to manifold. Can cause issues if a aftermarket gasket with out rivets is used I think you can check the...
  6. Scott06

    5.0 Mercruiser Problems

    The tks is an enrichment module that lets extra fuel in for warm up. It should hiss until it warms up at like 135 f or so. It was meant to replace an automatic choke so folks who don't drive carbureted cars and dont know how to set a choke can start it easily... IMHO a dumb system when two pumps...
  7. Scott06

    Can the base of engine work? Two to bolts under engine are rusted and can

    That drive has a dog clutch which will make a clunk when it shifts normally. Best to shift firmly and quickly into gear. Most likely it is normal
  8. Scott06

    Purchasing in this market

    Nice looking boat, I think you did the smart move. I prefer my boats pre scratched anyways.... I assume one of you has a GTO given the user name ? I have a 65
  9. Scott06

    Rochester 2 jet running rich before and after rebuild

    Did it work ok? This would be a great solution if the quality was decent.
  10. Scott06

    Still no power

    You have covered a lot already- I assume you checked the timing including total advance? Is the spark strong on a spark gap tester. What do the plugs look like as AD mentioned going lean is a potential issue given your sypmtoms. I know the carb was gone through but if it is lean I would start...
  11. Scott06

    Volvo 4.3 gl overheating

    Did u swap inlet and outlet hoses in raw water pump When getting the boat ready
  12. Scott06

    Still no power

    Have you done a compression test ?
  13. Scott06

    port side exhaust elbow over heating.

    No it doesn’t prevent that it is only to have warm exhaust manifolds theoretically preventing condensation during warm up
  14. Scott06

    1987 MIE 454 oil pump intermediate shaft?

    AD has you steered straight, but Next time run the engines on the ground before install
  15. Scott06

    port side exhaust elbow over heating.

    You don’t have them on your set up. My 2004 has them basically it feeds water to risers and manifolds separately risers cold incoming water , manifolds only get hot water after thermostat opens. Works fine on mine
  16. Scott06

    Had spindal changed now water coming in back of boat

    Then your bellows are shot
  17. Scott06

    Boat alarm staying on after cranking motor

    Did you unplug the sensors on bottom of lube bottle too?
  18. Scott06

    port side exhaust elbow over heating.

    I think the flappers are below this in the top of the wye pipe. Does your thermostat housing have the T with plastic balls/poppet valves ? these fan pass too much water to one side or the other if hung up .
  19. Scott06

    1984 --5.7 / 260HP camshaft ? REPLACE

    yeah rpm range of 3000-6500 is not a marine cam...
  20. Scott06

    5.0 Mercruiser Problems

    Start with basics- remove fuel filter and see if there is anything but fresh clean gasoline in there. Is the choke opening fully or do you have a TKS carb? If tks is the enrichment module kicking on and off like it should ?What do the plugs look like now that you changed them? Set ignition...
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