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  1. Scott06

    MerCruiser 5.0 will not start/run in idle mode (Carb Engine)

    Probably have two problems off info given. Not sure what model or year 5.0 and what carb but assuming it is a mercarb 2 bbl 1. carb either needs adjustment or rebuild then adjustment. First verify choke is opening when warmed at fast idle. Would try turning idle mix screw in and out to see if...
  2. Scott06

    Flotation foam

    Most go from the inside so there is no exterior fiberglass work like fairing and gel coat.you certainly can go from outside in, can paint the outside with automotive type finishes . Pay attention to transom thickness spec Scott gave you can glass the new transom from both sides to prevent rot...
  3. Scott06

    using a gm 181 marine head on a industrial 181

    The marine and industrial engines are pretty much the same. Big changes to 3.0 was around 90 or 91 went to one piece rear seal would think this would influence your oil pan fit Also around same time head port configuration changed I think one is large port one is small port intake has to...
  4. Scott06

    Dissembling a Mercury alpha 1 SE drive

    Pop drive off and get it on the bench soak penetrating oil between carrier and gear case, apply heat liberally to outside. The heat is key
  5. Scott06

    EMP Impeller kit

    You need a gasket ( thin metal plate is a gasket) on both sides of the flat wear plate. Did you new one come with a gasket for each side of plate. My original pump in my drive had a rubber or paper gasket on ether side.new merc impeller kit i got had the metal gasket you show. At some point merc...
  6. Scott06

    Dissembling a Mercury alpha 1 SE drive

    I found removing my bearing carrier was best to soak with kroil and be paitent applying some heat to outside of gear case. Pulled right out with a good size gear puller after getting the case warm enough to expand. It was enough heat to just start bubbling the paint.
  7. Scott06

    MerCruiser 3.0 MPI Electrical Short

    The longer I do things like this the more I tend to stay with oem parts, unfortunately a lot of junk out there. you can usually ohm test a coil. Attached are specs for my t bolt coil, you should be able to find similar specs for your est coil .
  8. Scott06

    3.0 MPI distributor? Specs needed

    Dependss. If you can rebuild the distributor which isn't hard if the shaft is not buggered and the advance plate is not corded then get a good core and rebuild it. If you cant get a decent core get a rebuilt one. You still need to reuse your 4 cylinder shaft for the rubbing block no ? Might be...
  9. Scott06

    Alpha Gen 2 Swivel Shaft

    Yes there are two ways to do it. pull the engine - which depending on the boat may or may not be easiest. If a typical bowrider, if you know what you are doing is an hour to pull the engine. you can access the steering lever by using a kit like this cutting access holes in the gimbal ring...
  10. Scott06

    3.0 MPI distributor? Specs needed

    You would not need to change anything on the EST to work. You just need to lock it in base mode. This is done to lock out the advance built into the module for setting initial timing with a timing light. If you leave it in base mode there will be no advance from the module, which is what I...
  11. Scott06

    3.0 MPI distributor? Specs needed

    Looks like the 3.0 mpi uses a delco est which cannot function without the module which will advance it… you could lock it in base mode my always supplying 12 v to i think the white wire with the timing shunt… then set your intial and only timing.. you could use any of the delco style kits out...
  12. Scott06

    projects other than boats

    I think you will find the 2.3 pretty durable and previous owners will not have beat the snot out of it like they would have with a 5.0
  13. Scott06

    2007 mercruiser 3.0 Rust by the looks of it on side of block cover

    That side cover is for the lifters and pushrods. Wire brush and paint but sitting under a cover can get condensation in there. there is not a casket leaking there, they don’t spend a lot of time painting them. If it makes you feel better run it on the muffs and look for water leaking. use it...
  14. Scott06

    Manifolds (Trying to figure out what I am looking at)

    150 psi is stock compression spec on these engines
  15. Scott06

    2007 mercruiser 3.0 Rust by the looks of it on side of block cover

    just surface rust I had some in similar locations on my 3.0 that was fresh water only. Nothing to worry over. AD has you steered straight on the valve cover vent hose to flame arrestor. Some oil is normal on these. Mine always left a little sheen but ran hard for many years before I sold it, 25...
  16. Scott06

    Manifolds (Trying to figure out what I am looking at)

    Use the oem merc gaskets they are silver and have I think metal inside vs a paper gasket
  17. Scott06

    engine water leak (NOT Transom or Stern drive)

    You will have to get under there and see where the leak is coming from. If you are lucky a core plug pushed out or if block is cracked it isn’t pushing water into the oil . Is your oil milky ? If it is the block is roached
  18. Scott06

    your opinion

    In salt water is a great addition , especially if you can do a full system. By donor - do you mean yo are looking for a used system? I think you will find more aftermarket system than factory installs. places like michigan motorz can set you up with a complete system. I think they are a...
  19. Scott06

    Exhaust Riser?

    yes do what you want with your boat and your money. to the OP if the sealing surface is good and they pass an acetone test you will not have an issue. In salt plan on replacing every 5-7 years. Inspect every year or two.
  20. Scott06

    Exhaust Riser?

    Most of the issue is the sealing surface - they can be filled with acetone and leak tested while off. Acetone will wick into pin holes and cracks and show defects that may not show on pressure test or water filled test
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