Recent content by Scott06

  1. Scott06

    2010 24' bayliner 245 cruiser with 5.0TKS and Alpha One

    what prop is current on it and what rpm is it getting at WOT? Best is relative to what you want to do with the boat. As Scott laid out thats a big boat for that engine so pitch will be low
  2. Scott06

    FXP prop help

    agree with comments above. You can put two marks with a punch on the inner splined hub and the outer ring to see if it is moving. Most likely it will not be moving. these are pressed in and over time (years ) they can slip
  3. Scott06

    Mercruiser 3.0L choke adjustment

    I have also had several 2 jets- grandfathers 1966 Penn yan merc 150 hp 1965 Lemans 326 2bbl 1965 GTO has 3 of them (tripower) 1991 Sea Ray - 3.0 had a mercarb Only real difference I see is the mercarb has one mixture screw vs two.
  4. Scott06

    Carb tuning

    Yeah all these carbs (Holley, AFB/Eddy, Q-jet, Rochester 2 jet) have their pluses and minuses. I have also found on both my 65 Pontiac and the boat the AFB/Weber/Eddy carbs to be really a great carb for ease of use and tuneability , especially for less experienced tuners. Anyone who tells you...
  5. Scott06

    Carb tuning

    one or both throttle plates may be upside down and not closing. Are you setting idle speed with the throttle cable disconnected? Are the throttle blades exposing the transfer slot? This could add fuel that the mix screw will not control. normally this is seen on hot rod engines with big cams...
  6. Scott06

    Mercruiser 3.0L choke adjustment

    The mercarb is a descendant of the rochester 2 jet so yes uses a vacuum piston in the choke element housing. Very similar to the holley electric chokes
  7. Scott06

    Carb tuning

    I found the same thing with the base gasket. Your edlebrock has the same square and spread bore mounting that my intake does. There is very little sealing surface in a couple spots on the secondary side with webber/eddy carbs. I found this when installing a phenolic insulating spacer. The...
  8. Scott06

    Started out as a good day on the water. 4.3 mercruiser

    The TB module is either mounted to the dist or on the exhaust elbow. Both are black boxes, sometimes with a knock module. just google 4.3 delco est. there are original Delco units and aftermarket knock offs. Sierra has units that are considered good. if I was in your shoes I would look for a...
  9. Scott06

    Mercruiser 3.0L choke adjustment

    choke pull off on a mercarb is inside the choke element housing. Its a piston behind the element vs a separate diaphragm with hose like a qjet or divorced choke to the op this like shows the adjustment of the choke by bending the linkage
  10. Scott06

    Mercruiser 3.0L choke adjustment

    you may need to bend the linkage to get it to the correct opening amount not just adjust the element which is more for the amount of time it stays closed. Did they properly set the idle mix and speed ? In warm weather it should really not need much choke anyways if properly set up.
  11. Scott06

    Started out as a good day on the water. 4.3 mercruiser

    It seems to be hit or miss with the est modules , also finding an actual delco est is not as easy anymore. Mich Motorz no longer carries actual Delco for the 4.3 and 5.7, only the 3.0. When I bought my repower partial engine from them in 2015 they normally supply them with the EST. I had them...
  12. Scott06

    Started out as a good day on the water. 4.3 mercruiser

    friggin auto correct... I meant the Merc TB (thunderbolt) is a great system, Merc just screws the owner by NLA or insane ignition module prices... so when the module dies a actual Delco Est (not cheap knock offs) is a good relatively drop in replacement. Yes the trigger sensor is not a bad...
  13. Scott06

    Started out as a good day on the water. 4.3 mercruiser

    Why would you replace the ignition system if it’s working? The atB is a great system until the ignition module needs to be replaced $$$. Then typical replacement is a delco est. this isn’t any better except module rEllacement cost. Both are OEM quality systems.
  14. Scott06

    1981 120 mercruiser rough idle

    not that it matters but the Iron Duke engine is a 151 CID Pontiac engine from the 80's, the marine 2.5 are Chevy based 153 CID engines that debuted in the chevy II in 1962, which was later made into the 3.0 marine and industrial engine. Good news is if you do need a new engine you could swap...
  15. Scott06

    Tinkering on the 4.3l this winter...

    25 would make sense as the 4.3 2 bbl is rated at 190 hp, the reman 4.3 with 4 bbl webber eddy is rated 225. I had heard somewhere on here that it takes 10 hp per 1 mph but can only assume the hull has something to say about it. I found the midrange throttle response on the 4 bbl to be way...
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