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  1. J

    Mercruiser 470 crankshaft sprocket play on shaft

    P.s the crank was fine
  2. J

    Mercruiser 470 crankshaft sprocket play on shaft

    Got the timing gear off. The key was bad as well replaced both. Just waiting on some gaskets to come in so I can put everything back together.
  3. J

    Mercruiser 470 crankshaft sprocket play on shaft

    Hi all so it turns out the key way in the sprocket is bad. See pic
  4. J

    Mercruiser 470 crankshaft sprocket play on shaft

    Thanks for the reply. I can rotate the crank forward and back a little and the crank and the crank damper pully moves Insync. However while doing this the timing gear on the crank will not move until I spin the crank a little further then it engages almost
  5. J

    Mercruiser 470 crankshaft sprocket play on shaft

    Hi All, I had a knocking sound only at idle over 1200 rpm and you would not hear anything and the engine will run great at 3800 rpm. As soon as I drop it back down to idle. It sounds like someone is in there with a hammer. Sound like it was coming from the front of the engine. I pull the...
  6. J

    1999 mercruiser oil pressure drops bad after 3000 rpm

    Hi All I installed a mechanical oil pressure gauge and over 3000rpm i have 65psi. sender unit was bad i replaced it and it now confirms what the mechanical gauge was saying. i still have a light lifter noise only at idle. i did take the boat yesterday for a 2.5 hours cruiser and she ran...
  7. J

    mercruiser 4.3 alpha 1 gen 2 shift issue

    thank you bondo i will try to adjust cable again maybe i missed something
  8. J

    1999 mercruiser oil pressure drops bad after 3000 rpm

    Hi All, i have a 1999 mercruiser 4.3 serial #OL319690 i ran the boat first time this season and realized that my riser were bad and that my oil pressure was going down after 3000 rpm. between 5 and 10 psi. so far i replaced manifolds and risers also changed the oil because the level was...
  9. J

    mercruiser 4.3 alpha 1 gen 2 shift issue

    Hi All, i have a 1999 4.3 with alpha 1 gen 2 . it shift really quick into reverse but going in to forward the engine rpm goes up before it clunks into gear. i followed the adjustments of the cable everything was in spec. ( cable was set to 6" from barrel to center hole, slack in cable is...
  10. J

    mercruiser 5.7 fresh watter cooling

    Hi All, Happy new years eve !! just thinking of upgrading to fresh water cooling on my 2002 Mercuiser 5.7 L it has under 400 hours on it. Is it worth to install a new fwc kit (MFH 5320b) at this point ? just trying to figure out how much longevity this would add to the engine or is the...
  11. J

    2002 mercruiser 5.7 head reassembly

    Hello I need to find instruction on putting a head back on a 5.7 l mercruiser. Does anyone have torque specs for head bolts instruction .
  12. J

    Mercruiser 250hp 5.7L rpm drops by it self

    While cruising my engine rpm drops from 3800 to 3200 it never stalls. I putted along at idle for a little while and then got it back up to 3800rpm and everything was good for a while then the same thing happens. I unscrewed the gas cap to make sure my vent line wasn’t clogged up and problem is...
  13. J

    What oil filter ?

    Hello I have a mercruiser 470 which I have been using a ph 5 or the cross over of Napa which I believe is Napa 1060 I have a newer boat with a 2002 mercruiser 5.7 which filter should I use ? Now if I look up the mercruiser part number 35 866340 q3 which this part number fits both engines so...
  14. J

    2002 mercruiser 5.7 clacking sound

    it sounds like this https://youtu.be/HRyOwnhQwgE any help would be greatly appreciated
  15. J

    Mercruiser 5.7 250hp spark plug gap

    Hello any body know the correct gap for plugs head champion plugs new plugs are ngk serial number of engine m623660 thanks
  16. J

    470 knocking noise

    Hi guys the end of last season it starting to make a knocking noise at idle if I throttle it up noise goes away. Motor runs great except for the noise that only happen at idle. I pull one spark plug wire out at a time and the noise never went away. It sound like it coming from the front bottom...
  17. J

    Where can I find part # 68706

    Hello I need a new gasket for mercruiser 470 side cover but when I look it up it's no longer available any body ever just use rtv on this gasket thanks
  18. J

    Motor oil leak into bildge

    Hi guys My engines is leaking oil into the bildge and I really cant see where it is coming from but it's a pretty good leak 1 hour I lost about a quart I fill it back at. The dock did not run it and the next day I was still full so I think that would rule out a rusted oil pan I replace valve...
  19. J

    mercruiser 470 stalling at no wake speed

    hi everyone so I have a 470 with petronix ignition and the boat just started to miss and stall some times at no wake speeds if I throttle up a bit it runs fine at cruising speed fine as well I do have a fuel filter /water separator I just recently started putting in marina gas not sure if...
  20. J

    Mercruiser 470 weep hole

    Hi guys so last time I took the boat out I notice antifreeze in the bilge. Checked the weep hole and it was leaking I just replace the seal the beginning of last season. Wtf. It's a steady drip my club is going to have a boat run like 10 mile total. I was think about dropping the cap down to a...
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