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  1. Scott06

    Which manual covers digital distributorless ignition

    Hopefully these will be legible
  2. Scott06

    Need help with sterndrive parts

    They can get damaged during and over heat and fail. Look athe the rubber boots connecting the exhaust elbow and pipes they usually get baked and the plastic components and water tube that connect to the impeller. All thes plastic items are exposed to the exhaust and will melt if water flow into...
  3. Scott06

    Which manual covers digital distributorless ignition

    If you can find merc service bulletin 89-9 it covers ddis . Yeah no need for base timing mode, just check for 8 btdc with a timing light. advance is Supposed to be 26 degrees at 2600 rpm for 34 degress total i had one on my 91 searay never had an issue in 20 years with it. Timing never moved...
  4. Scott06

    Outdrive leaking oil

    You need to take the drive off split it and pressure test it. Could be from water pump base seal, shift shaft or upper driveshaft seal
  5. Scott06

    Prop shopping

    Black max will work fine for a all-around prop. Michigan vortex is similar Quality. Depending on how you want to use it -load of people and gear watersports or cruising you may want to change pitch or blade configuration. Best bet is see how a replacement black max works and go from there.
  6. Scott06

    1983 Four Winns mercruiser 488 3.7L overheating HELP

    Inspect the exhaust manifold and elbow for restrictions is this boat used in salt water
  7. Scott06

    Prop size help please??

    There is a knob or dial on the back with 4 cyl, 6, cyl, and 8 cyl settings and idle of 1000 would be very fast
  8. Scott06

    2009 4.3 mpi running hot

    Have your manifolds and elbows been inspected or replaced? If you are in salt and havent replaced your manifolds pop the elbows off and look in cooling passages
  9. Scott06

    Prop size help please??

    Would check your tach as 6 k plus likely inaccurate
  10. Scott06

    How will this prop perform on my boat?

    It shows a 23 pitch on it, but the hand markings and stamp are indicative that someone had it reworked either to change pitch or add cup. that and the whale tail tell me the PO was trying to solve some performance issue. as bondo stated figure out what your wot rpm is now and we can go from...
  11. Scott06

    ANOTHER WATER IN OIL QUESTION

    When you say you put your finger over plug on back of head where is it ? Is there a core plug on back of head that leaks ?
  12. Scott06

    Reverse issue

    I suspect you are right that it is not fully going into gear maybe shift mechanism adjustment? Would be worried that the cone clutches are not cleanly engaging possible grinding as they slip. You using the VP lube had read something on another forum folks using merc HP gear lube in VP drives...
  13. Scott06

    How is Texas for boating?

    My cousins live in Austin been out on lake travis several times with them. I think in austin area there is a couple good size man made lakes. Water levels can vary based of rainfall
  14. Scott06

    Frustrated fuel

    what type of ignition system is on it? Thunderbolt 5 ? If so here is a troubleshooting guide https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/ so by voltage evry where with the ignition on you get 12 v to positive side of coil
  15. Scott06

    ANOTHER WATER IN OIL QUESTION

    That implies head gasket between those two adjacent cylinders is bad.
  16. Scott06

    Maybe Dumb first time boat owner maintenance questions.

    As mentioned replace the bellows gimbal and ujoints. If yo are handy you can usually cross ref the ujoint to an automotive the thermostat needs replacement if you are only running at 120 The prop you may want to test the tach with a shop tach or timing light to see if it is off (happpens...
  17. Scott06

    Bad day on the water - NEED ADVICE!!

    Get a used transom housing off Ebay if you do a serach they are between $700-1200 for units minus trim rams. Either way engine needs to come out and inspect the transom for hidden damage. Finacially painfull but your mechanic is steering you straight. Speak with your insurance company unless...
  18. Scott06

    Lower prop pitch to get higher RPM?

    Here is a link to the stickie on low wot https://forums.iboats.com/threads/list-of-possible-causes-of-low-wot.289767/ id verify the tach against a shop tach and go through the list before buying a prop. under the line item of ignition components set check the timing and total advance. If the...
  19. Scott06

    4.3 set timing?

    Here is one service bulletin on it https://f01.justanswer.com/oldnewenglandmarine/27437009-fea5-4619-b04c-92144e25bba4_Engine_Dieseling_or_Running_on.pdf
  20. Scott06

    4.3L block replaced with one that has the balance shaft removed

    Yes but this is different - rick took a older block that wasnt designed to have the balance shaft in it and upgraded to the newer vortec heads for more HP. If you have a balance shaft block with no balance shaft in it you will ruin the engine immediately as there will be no oil pressure due to...
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