Search results

  1. Scott06

    Assembling a 4.3 MerCruiser v6 - Parts check needed

    Cast is fine and what is standard in GM marine engines for many years. I believe they were hypereutctic but not 100% sure. Yes there are better pistons out there but bottom line keep detonation at bay and they will be fine.
  2. Scott06

    Doing a Full Removal 1986 Mercruiser 3.0L 140 hp Engine Question

    i think when I looked at building a gantry when I did mine I think I needed the lifting point to be around 10 ft maybe higher. So 2ft is probably too low. remember the legs have to go under the boat/engine. Depends on how high the gunnels are when you are on the trailer. Have seen folks...
  3. Scott06

    Assembling a 4.3 MerCruiser v6 - Parts check needed

    this is the thread I was thinking of- https://forums.iboats.com/threads/stumbling-edelbrock-1409-4-3l-v6.670697/ in there is a link to another member who arrived at basically the same carb set up
  4. Scott06

    Assembling a 4.3 MerCruiser v6 - Parts check needed

    Webber & Edelbrock are carbon copies. only diff you may see Merc used a 3 stage step up rod on some of them. Eddy parts will fit. IF you search the threads here you will find some threads where people did NOT find that the eddy jet kit for 4.3s worked well with Vortec heads. I'll see if I can...
  5. Scott06

    Shift shaft seal on alpha gen two

    Thanks I have the seals (OEM Merc), Issue is I cannot get them to make a seal in the plastic housing (23-815921A20). They have leaked between the seal OD and the plastic, used permatex #3 and let it set up 8 hrs still bubbled on pressure test. The old seal was very hard to get out new seals...
  6. Scott06

    Alpha 1 Gen 1 oil fill hose

    If you have them I think they are worth keeping for sure
  7. Scott06

    3.0 tap/knock

    Can tell from the keyboard. It’s making noise so you need to go through and measure all the clearances vs spec. If you don’t have the mI do eters would take it to some one who does
  8. Scott06

    Alpha 1 Gen 1 oil fill hose

    Mercruiser offered a kit to add the drive reservoirs to gen one drives. Very rarely seen them in service. The 1991 and up gen two had it from the factory. You can run them without. Only advantage is having it if the input shaft seal goes you loose drive oil into the bellows and you may not see...
  9. Scott06

    I need help, boat runs rough and stalls. I pumped new gas and lots more.. I need help

    It is somewhat common for tach to mess with getting a good spark. If I were in your shoes I would leave tach disconnected put original module back in and test it out
  10. Scott06

    Prop Help

    Even better if it’s on a jack plate , play with dropping it some yiu can look at pics if you google it. Cav plate ( lower of the two plates) should be even with bottom of boat. If you run at higher heights or are on a power cat you can run a prop made for areated water like Revolution 4 , or...
  11. Scott06

    3.0 tap/knock

    I would check the side clearance on the con rods vs spec. In your first post the main bearing cap is off was there scoring on the crank? you said crank was done by whom ?
  12. Scott06

    Prop Help

    What is the motor height - how high is the cavitation plate in relation to the hull bottom ? Thinking motor is set too high.
  13. Scott06

    Merc cruiser electrical

    I did this years ago on a 1966 mercruiser. If I recall correctly I just hooked up the orange battery wire, tapped off the other two and disconnected the voltage regulator
  14. Scott06

    Mercruiser 3.0 Leaking Water On Top of Manifold

    Yeah that looks like under the manifold drain.
  15. Scott06

    Shift shaft seal on alpha gen two

    Gen 1 & 2 are completely different setups gen 2 has a plastic housing for shift shaft seal and speedo tube connection . I bought the seal was leaking between OD and housing. I bought two seals. I used permatex 3 this time instead of red loctite gasket maker. Seems to be holding pressure now ...
  16. Scott06

    Shift shaft seal on alpha gen two

    Just to close this out. The seal was leaking between the metal sleeve and plastic housing. I had put a red permatex gasket maker around it but that’s where it was bubbling … not sure why it didn’t fail the original pressure test, but certainly makes buying the whole p,attic housing with the seal...
  17. Scott06

    I need help, boat runs rough and stalls. I pumped new gas and lots more.. I need help

    Look on summit racing for the module I think their ac delco modules were under $100. if those primary side coil ohms are accurate yes get new coil.
  18. Scott06

    Shift shaft seal on alpha gen two

    I saw the entire cover or bushing too. Did the grease and sealer. Will do it again , get bushing if it doesn’t hold. Hopefully I find a nicked lip when I dissemble it
  19. Scott06

    3.0 tap/knock

    I would be checking the clearances and also wrist pin. doesnt sound like valvetrain to me but could be. Even if it was machined check them always. I have had to take rods back that were resized wrong. was it bored? I had an old volvo that on real cold starts would have some piston slap until...
  20. Scott06

    Shift shaft seal on alpha gen two

    Just got done doing a reseal and a few bearings in my 2004 gen two. Pressure tested it , passed , filled it with lube and laid it on the garage floor for a month, was gonna put it back on the boat this weekend, found lube leaking out of shift shaft seal… which I just replaced. I bought two...
View older results
Top