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  1. J

    Crusader 454 tune up

    Do the fuel lines attach to the tank and pumps with hose clamps or the fittings on the lines in the first reply? Whichever type of line you buy, make sure it's rated for use with Ethanol. I would recommend buying cap/rotor/wires that have lifetime warranty. Also, assuming the oil filter is...
  2. J

    Mercruiser 5.0 with Bravo 3 : please help

    HP sells vehicles, torque turns wheels and props- also, injected 5.7L in boats often produce more than 300HP, which started 30 years ago with Mastercraft using the Corvette LT-1. It was followed by Indmar's LTR, which was rated at 330HP. But the power isn't needed for top speed in most boats...
  3. J

    Mercruiser 5.0 with Bravo 3 : please help

    My questions are: Who would put a 5.0L in a 26' Sea Ray Sundancer? I don't think I have seen a 5.0L with a Bravo, for that matter. Is this the OEM engine?
  4. J

    2000 mercury 50

    With the key out of the ignition switch, try to turn the prop without touching anything else. If it doesn't want to turn, make sure to get it to go into neutral by disconnecting the shift cable and try it again. If it IS in gear with the helm in the neutral/centered position, make sure the cable...
  5. J

    2000 mercury 50

    What would the gear oil have to do with ANYTHING?
  6. J

    Volvo Penta engine swap

    Rebuilding the OEM engine or replacing with the same is much easier WRT attaching all of the accessories. Why might the 4.3L need to be replaced?
  7. J

    Mercruiser 5.0 with Bravo 3 : please help

    With it trimmed up, the prop isn't meeting as much hydrostatic pressure, so it's natural for it to rev higher. Keep looking for the problem if it revved higher when trimmed lower. How did you end up with dirty fuel- was it water or actual dirt/debris? If debris, I would ask about how you're...
  8. J

    Unsustainable WOT

    Possibly low fuel level and sloshing once it was no longer accelerating, too. If the boat runs into a large wave or wake, the gas can leave the area of the pickup tube and suck some air- bad fuel sensors and letting the level go too low can be a big problem.
  9. J

    Unsustainable WOT

    These had other problems a few years later, after the exhaust manifolds & cam were changed- water ingestion from rotating backward after run-on, bad raw water pump seals.....Mercruiser sent a service bulletin out that had about 9 things that could be tried. Their session at the Regal dealer...
  10. J

    Unsustainable WOT

    If two cylinders show low compression, I would have done a cylinder leakdown test but first, I would have used compressed air to find out if the valves were leaking. When you posted the info, you mentioned 'middle cylinders- that has to mean 3&4- the firing order was verified? If it cranked...
  11. J

    Help Identifying 80's Mariner 50hp

    You need to get the boat to balance on the water without anyone in it- trying to use trim tabs, etc is the wrong way to go about it. According to the link, it's from 1984- https://www.southcentraloutboards.com/pages/mariner-model-year-guide/ If you want specs, call Mercury at 262-929-5040
  12. J

    Mercruiser 350 low WOT error code 42 w/video

    In this thread, I have seen absolutely nothing about the fuel pressure. That's ALWAYS the first thing that should be checked when a performance issue begins and Indmar used to include that recommendation in their on hold phone message. The serial number is shown, but nothing about the...
  13. J

    Mercruiser 350 low WOT error code 42 w/video

    In this thread, I have seen absolutely nothing about the fuel pressure. That's ALWAYS the first thing that should be checked when a performance issue begins and Indmar used to include that recommendation in their on hold phone message. The recommended tests were: KEOE (Key On, Engine Off Idle...
  14. J

    Mercruiser 350 low WOT error code 42 w/video

    Does that scanner allow taking a snapshot of all data? If so, I would recommend doing that at KEOE (Key On, Engine Off) and at idle. Look for the differences. As I posted, you can (and should) disable Spark Stabilization, so your timing won't vary. If Mercruiser used similar programs, and...
  15. J

    Mercruiser 350 low WOT error code 42 w/video

    If the Delphi ECM was used, it definitely can control timing advance. The timing light jumping around and as muc posted, the bypass needs to be used to stop what is called 'Spark Stabilization' by the trainers at the Mastercraft/Indmar sessions I attended and in order to correctly set base...
  16. J

    Any E10 (Ethanol) problems you are aware of on older engines?

    And then, there are the effects from Alcohol on gasket cements like Quicksilver Perfect Seal, which looks/smells works just like Permatex/NAPA Aviation Form A Gasket and Alcohol is the recommended solvent for those. Then, there's phase separation, which CAN'T be removed by adding 'dry gas'...
  17. J

    Any E10 (Ethanol) problems you are aware of on older engines?

    I worked at a bar and the bartenders would shout "Who needs one????".
  18. J

    Any E10 (Ethanol) problems you are aware of on older engines?

    While alcohol raises Octane, its hygroscopic nature is one of the things that make it a bad additive. Also, fuel pump impellers aren't always made for it, so they tend to swell, as they did in the Carter in-tank pumps used for MasterCraft injected engines when MTBE and Ethanol were introduced in...
  19. J

    Any E10 (Ethanol) problems you are aware of on older engines?

    Ethanol is a scam and a scourge on the marine and small engine industries. The Just Stop Oil protesters and Greta Thunberg need to be used for fuel. Just be prepared to replace rubber and plastic parts that will be in contact with the fuel. Seal the tank vent when it's in storage over the...
  20. J

    Starter mount keeps breaking.

    The throttle shouldn't have anything to do with the starter. Are you working on this boat in the shop, or on the water? If possible, do it in the shop so you can watch the gear when it engages, to see if the Bendix is hitting the bottom of the flywheel's teeth. You wrote "noticed that the...
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