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  1. Scott06

    Wiped cam lobe mechanical fuel pump

    Yes you can T the switch and sender to same port . Will likely be 1/8” npt On later engines like mine this is exactly how mercruiser does it.
  2. Scott06

    Mercruiser 3.0 LX spark plug failure

    I had a center electrode come out of an NGK plug on a Toyota was rattling around in combustion chamber intermittently tapping. Like u I thought engine was really messed up, took valve cover off saw nothing amiss, for lack of any other thought took a plug out and saw the center electrode is...
  3. Scott06

    Which coil to use?

    Electronic ignition coils like used on HEI have an internal resistor, points type coils use an external resistor. Will have a resistance wire in Barnes or ballast resistor to lower voltage to not burn up Points
  4. Scott06

    1989 Sea Ray thunderbolt no spark

    Test the sensor in the protocol that BT posted u can verify if it is sensor or module then make intelligent decisions. Google Delco est for 4.3 to see current costs as that is what I would do to tell u …
  5. Scott06

    1989 Sea Ray thunderbolt no spark

    Google thunderbolt troubleshooting there is a guide in the manual that u should follow including tapping the white green wire to ground You replaced the distributor did u also replace the sensor in it ? The TB ignition is one of the best systems out there . Only issue is if the module dies...
  6. Scott06

    Online parts supplier recommendations

    I order from OSD in Ohio They have been pretty good over the years helped keep our 04 GTI RFI LE Also used the following Leaders rpm Seadoo parts warehouse
  7. Scott06

    mercuiser 888 wont idle below 1000 rpm

    Yes it should open them slightly, set the screw whee it will remain idling about 650-700 rpm. Iif completely closed it wont idle . As outlined you need to do this while setting the timing and idle mixture
  8. Scott06

    mercuiser 888 wont idle below 1000 rpm

    there should be a idle speed adjust screw that sets idle speed. if this is missing or miss adjusted yes it will die. shown in second pic in article...
  9. Scott06

    mercuiser 888 wont idle below 1000 rpm

    is the throttle cable allowing the plates to close ? there is an adjustment on throttle cable. If you take throttle cable off can you turn the idle speed (not mixture) down
  10. Scott06

    Another gear oil thread... 80w-90 vs. 90

    Probably the 3 near me have it in the sports goods /gaming section. Not in the automotive section. they have a small section with boating chit and its in there
  11. Scott06

    Mercruiser 350 MAG MPI MIE SKI 0L305632 skipping

    Yes did not mention wires replaced, Should also double check firing order since cap was changed
  12. Scott06

    Mercruiser 350 MAG MPI MIE SKI 0L305632 skipping

    ok didnt catch that neither of them are Crab caps one looks to be Delco EST , the other Thunderbolt
  13. Scott06

    Mercruiser 4.3 MPI Q's

    I have used a J shaped piece of old radiator hose -to do so take off the supply hose from OD which is likely on RH side of thermo housing put the J on there and fill with AF
  14. Scott06

    5.7 EFI stalls when warm and shifting into gear

    if it leaks below intake I think you would get oil sucked into intake ports maybe see it on spark plugs.
  15. Scott06

    Mercruiser 350 MAG MPI MIE SKI 0L305632 skipping

    Agreed would look if fuel pressure is dropping. would also think the crab cap but that was just replaced. Is battery and connections good? seem to see a lot of issues with MPIs getting squirrely if battery condition is iffy.
  16. Scott06

    Mercruiser 4.3 MPI Q's

    yes just read what MUC wrote about the flush kit where the 5 gallon one falls short is time to run the engine and recirculate the AF so passages get fully turned over to AF vs mix of AF and water. Thats why marinas use a huge amount of AF that is the expensive PG type with corrosion inhibitor...
  17. Scott06

    Mercruiser 350 MAG MPI MIE SKI 0L305632 skipping

    What do spark plugs look like, by reading them you can tell a lot about air fuel ratio. Do you see this miss on a timing light? Do you have strong spark on a gap tester
  18. Scott06

    Mercruiser 4.3 MPI Q's

    Yeah I know but stainless can gall and the plastic ones work just fine from my perspective. They seem to bother folks but they work for me.
  19. Scott06

    Mercruiser 4.3 MPI Q's

    you will get more clarity in the oil threads... bottom line find a system that works for you and your boat. if its easy to drain drain it, if you reply on AF need to use a big system so it can get up to temp and make sure the freeze point works. Both ways get to the same place depends on the...
  20. Scott06

    Crownline 180 BR - Merc 4.3 MPI Prop

    if you were at 4600 would expect dropping 2" and adding a blade would get you around 4800-4900 or so at WOT. Just did a similar swap on neighbors 20-21 ft Larson with a 4.3 Volvo MPI, had a 3 blade 19" Aluminum VP prop and was low on wot maybe 4400 or so, went to a 17" 4 blade VP prop hits...
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