Search results

  1. T

    Mercruiser 357 question

    Thanks so much I’m going to be ready through those links tonight about the part numbers sombody got rid of the thunderbolt ignition and installed a delco one I think? I needed a shunt to time it and I got a new ignition modual from my merc dealer (bills outboard in hingham Ma) love that place...
  2. T

    Mercruiser 357 question

    Their is a through hull for the water and yes it’s I could be an alpha one so I must have that included kit thanks now does anybody know where I could find parts breakdown on these motors I want to get a look at what cams they both have
  3. T

    Mercruiser 357 question

    Thanks it is not a closed cooling system
  4. T

    Mercruiser 357 question

    Hello I bought a boat with a 357 merc part number 865108r88 it is connected to an alpha but has its own raw water pump when I look up the part number it shows an engine without the raw water pump but mine clearly has one and I believe it’s factory I’m about to get this rebuilt is it possible I...
  5. T

    Blown head gasket

    Other 4 cylinders had good compression I have anouther freshly rebuilt non vortec 5.7 that I put in the boat Grady white 241 offshore and I am disappointed in the speed I never ran this boat with this motor I bought it broken I would like to take these heads to machine shop and do the vortec...
  6. T

    Blown head gasket

    The engine still started and ran smooth only under a load it was knocking it’s a Mercruiser 357 alpha
  7. T

    Blown head gasket

    What causes this center 2 cyl on each side I bought a boat with this engine knowing it was blown but I was considering using the vortec heads and Mercruiser intake on the other motor I have for boat
  8. T

    Transom straps

    Thanks for all the replies I’m not sure why the winch post wouldn’t count as part of the trailer and do you think my bow line (at least 1/2”rope) is that much weaker than a tie strap ? And I do think it makes sence to go by trailer weight I’m asking because most of the crank straps specifically...
  9. T

    Transom straps

    What are some opinions on how heavy transom straps should be generally? My boat 241 offshore I estimate around 4400 lb I loop my bowline around winch bracket and back to boat and 2 transom straps I’m thinking they should have st least 1500 lb working load hoping my thick bow line might have 1500...
  10. T

    5.7 alpha knock please listen

    I pulled oil pan and all looked good was about to reinstall and chase an ignition problem I wanted to do a compression test first it failed miserably 180 -160 on outside 4 cylinders and 25-50 on inside 4 nbd I have a pre 86 350 rebuilt sitting here that was my original plan going to move forward...
  11. T

    5.7 alpha knock please listen

    Well I pulled the engine removed oil pan and as far as I can tell all the rods are tight wrist pins on pistons seam tight oil looked good cut open oil filter no metal oil pressure was good spark plugs all looked the same a little wet fouled smelled like fuel. but I have a rebuilt 2piece rear...
  12. T

    5.7 alpha knock please listen

    Thank for the ideas I do think it sounds just like that guys noise I bought this boat because I had a motor for anouther project that’s not happening but ppl kept telling meme to make sure before I swap the motor and maybe still have a knock not to mention the motor I’m pulling is a later model...
  13. T

    5.7 alpha knock please listen

    I was thinking spark knock too but I replaced the ignition module and reset timing it is a est distributor and I used the shunt tool and set it to 10 some ppl say 8 but Mercruiser tech said 10 and I can rev it in driveway and not here a thing
  14. T

    5.7 alpha knock please listen

    Nope
  15. T

    5.7 alpha knock please listen

    Here is the video
  16. T

    5.7 alpha knock please listen

    Only in water when I kick the throttle up when I’m at like 1200 rpm in no wake zone it’s fine start to give it any throttle it starts to me it definitely sounded like the engine but my engine shop machine shop guy and a seasoned boat mechanic that was at his shop watched the video and thought...
  17. T

    5.7 alpha knock please listen

    The boat is an 86 with alpha gen one sei drive that is just about broken in motor is a 2011 Mercruiser 357 I haven’t tried to isolate the noise after the water test I was so sure it was the motor that I was done but after speaking with a few ppl I’m not sure just thought I’d get anouther opinion
  18. T

    5.7 alpha knock please listen

    Hello, I recently purchased this boat, the owner said it needed a motor (Witch I’ m prepared to do.) But the 2 people that listened to it think it’s something else. there’s no noise at idle, and I have good oil pressure.
View older results
Top