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  1. jimmbo

    Prop Question... Bayliner BR185

    Before you go buying Props, a few questions 1) how long have you owned this boat? 2) What condition is the Motor in, as in: Compression Numbers, Spark at all Cylinders, Spark Plugs? 3) What WOT Rpm are you getting with the current Prop? 4) Do you know the WOT Rpm range for that Motor? If you...
  2. jimmbo

    83' 115hp Mercury, prop slip

    Running like this starved the Engine of Water, and the heat warped the Water Jacket Cover, resulting in the all too familiar water leaking from the Spark Plug resulting in this being required
  3. jimmbo

    Tinkering on the 4.3l this winter...

    If that is an engine out of a Car/Truck, it is not going to be much use in a boat, until some Changes are made to it.
  4. jimmbo

    Tinkering on the 4.3l this winter...

    230 out of a 4.3? maybe at about 5700 rpm 205-210 would be about the limit and still have any bottom end torque
  5. jimmbo

    Quadrajet Replacement Options

    The only Plug and Play Carb will be a used on from an Identical Engine(model and year), or from Mercrusier(not likely viable), otherwise it is Plug and Pray. Personally I wouldn't touch a Carter/Weber/Edelbrock carb, but that is me. I like Q-jets and Holleys
  6. jimmbo

    83' 115hp Mercury, prop slip

    Mercury's big inlines had gear housings that were more Hydrodynamically Efficient with Gear Ratios and Props that were miles ahead of what OMC was offering in the 60s on most of its V4s, hence one of the reasons Mercs could outrun the Competition
  7. jimmbo

    Which battery is best?

    As Always, People should check the Owners Manual first. Of course REAL Men NEVER read an Owner/Operator Manual....
  8. jimmbo

    Which battery is best?

    No, all Marine Batteries are not Deep Cycle. If you want to run both, Cranking Battery for the Engine, and Deep Cycles for all the Electronics, then a way of Isolating them from each other, with regards to Charging, unless your Outboard, has 2 separate Charging Systems(I know my OMC FICHTs did)...
  9. jimmbo

    Black scuff marks on cylinder walls

    Heat can cause Cracks, but those Bubbles were formed when the Aluminium was Molten
  10. jimmbo

    Black scuff marks on cylinder walls

    Just Bubbles in the Aluminium
  11. jimmbo

    Black scuff marks on cylinder walls

    Deleted
  12. jimmbo

    Black scuff marks on cylinder walls

    Going back in the yrs, it appears that 1991 was the last yr there was an O-ring at the top of the Driveshaft. There would be an O-ring included in the Water Pump Kit, if the Kit was covering a large number of years.
  13. jimmbo

    Black scuff marks on cylinder walls

    Looking at the Parts Diagram for that Model # doesn't show an O-ring on the Driveshaft. Put some Grease on the Splines, but make sure there is None on the Top of the Driveshaft, or Bad Things will happen. Do Not put any grease on the Splines in the Crankshaft, as that too can cause Bad Things...
  14. jimmbo

    Black scuff marks on cylinder walls

    It does look like the Bottom Crankcase Seal has seen better Days. However, knowing which engine this is, will make it easy to find the correct Parts Listing, which will reveal if it has an O-ring on the Driveshaft.
  15. jimmbo

    Boats from work.

    There have always been Bean Counters interfering with Quality. It has gotten worse since the 80s, when Consumer Protection Laws were Gutted. These Days it is srictly Caveat Emptor, on any and all Purchases, as Consumer Protection has morphed into protecting Profits over Consumers
  16. jimmbo

    Black scuff marks on cylinder walls

    Not yet. If the scoring doesn't get too bad, it likely can be machined to 30 thousands overbore, so as racer says just run it, might last several yrs....
  17. jimmbo

    Boats from work.

    That Cobalt looked like a lot of the Glass was not saturated with Resin. Seems top more and more Common the past 20 yrs I had a Transom Delamination, and Glastron did Eff All, so much for their POS VEC Lifetime Warranty
  18. jimmbo

    Black scuff marks on cylinder walls

    Actually, with the use of a Good TCW-3 Oil, and the engine properly Propped, Carbon Buildup is quite Low and Slow
  19. jimmbo

    anyone know what size and thread type the outer prop shaft nut is?

    What kind of Tool are you trying to Fabricate? You can take the Nut, to a Nut and Bolt Supply, and they can measure it
  20. jimmbo

    Black scuff marks on cylinder walls

    Fresh Paint can hide a Multitude of Sins As Racer has said, it has been rebuilt, I wouldn't be surprised if those Rings were reused, if they were, they would have fit the earlier Scoring, and are trying to duplicate it on the newer Bore One of the Ports does appear to have what looks like Ring...
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