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  1. dingbat

    1400 RPM loss from 13 to 15 pitch!!!

    Then you certainly know that you're not going to figure out what is going on from a single data point. ;) What does your data at 1000, 2000, 3000, 3500, 4000 and 4800 rpm look like? How do those result overlay on your motors' power curve? What you'll find is your out of Horsepower trying to...
  2. dingbat

    Deck draining to bilge

    Off the top of my head Grady, Parker, Proline, Judge and Whaler all still build walkarounds and or pilot house. Lots of “offshore capable” DC on the market as well. Having said that, Walkarounds and pilot houses perform poorly offshore. I’ll take a center console over a either configuration for...
  3. dingbat

    How to know the drive shaft length without seperate the lowerunit?

    https://www.leeroysramblings.com/OB_shaft_length.htm
  4. dingbat

    Winter Fuel Additive

    Whatever is in stock or on-sale at Tractor Supply upon my arrival.
  5. dingbat

    EFB Batteries

    Typical grp. 24 deep cycle gets you 80+ AH No such thing as a “deep cycle” starting battery. ;) Battery switch to combine the starting and trolling batteries is cheaper and more reliable than a jump box, that needs to be charged a well.
  6. dingbat

    Can you use 2 stoke oil in a prestolite, trim pump?

    2 stroke oil is full of solvents. Not good for orings. Used NH 134D hydraulic oil when I rebuilt my unit two years ago. Called for Dexron but figured I’d go one step better since I had 5 gallons left over from changing the tractor hydraulic fluids
  7. dingbat

    1400 RPM loss from 13 to 15 pitch!!!

    Not necessarily. It’s called a torque “curve” for a reason. Once you pass peak HP (rpm) it’s drops off rapidly. Doubt it. You had a dramatic change because you changed prop designs. If you stay with the same prop design, your back in the 200 rpm per inch range. At what rpm? Recommend running...
  8. dingbat

    EFB Batteries

    You really need to do the math. Options are limited in that size range. You need AH and starting batteries are not designed for AH use. By 5 or so AH. Not worth the $$$ over the standard 24M dead cycle. That’s up to you to decided. No getting around doing the math. How much power do you...
  9. dingbat

    Bearing Buddies Ruined?

    BB can’t expand when bottomed out, full of grease. Will blow rear seal sooner than later Remove BB, clean out excess grease and reinstall
  10. dingbat

    EFB Batteries

    The Interstate 27M EFB battery appears to be a rebranded standard, 27M deep cycle (I run two) for use in cycled, hybrid automotive use. Same size, weight and AH rating If it were me, I’d replace the grp. 24 with a standard 27M. Gives you the reserve AH the starting battery isn’t providing yet...
  11. dingbat

    Gas turning milky

    Define bad gas…. Either lost volatility (old) and varnished up (old)or full of water? Emulsified water will turn gasoline white. What do your fuel filters look like? If it’s water issues, using E0 isn’t helping your problem. The alcohol in E10 absorbs any moisture in the tank and harmlessly...
  12. dingbat

    FWD Drive (forward facing drive) Volvo Penta

    Guessing you had water get trapped (under a seal?) that went anoxic. At that point aluminum goes plop, plop, fizz, fizz in a hurry
  13. dingbat

    Lawrance Elite 7 HDI sonar/ gps unit question

  14. dingbat

    What is the next logical step?

    That's the "surface" charge I noted above. https://batteryuniversity.com/article/bu-804c-acid-stratification-and-surface-charge
  15. dingbat

    What is the next logical step?

    Means nothing. Marine Batteries typicaly die from abuse, not age. Step #1 Make sure battery charger is off and crank the starter for a couple of seconds to burn off the surface charge on the battery. Step #2 Measure voltage on both batteries. Should be between 12.6 and 12.7 volts. Step #3 If...
  16. dingbat

    What is this on the transom?

    Not familiar with your particular boat but generally speaking, your looking at 12-18" fore of the transom, offset from the keel (Radius of prop)+3-4"
  17. dingbat

    Voltage Regulator

    Plug and Play........but you don't identify and resolve the problem you'll be right back where you started
  18. dingbat

    Lawrance Elite 7 HDI sonar/ gps unit question

    According to your manual you have a dedicated down scan page. I would start there
  19. dingbat

    Radon and seal concrete under tub

    Careful with your material selection as Radon can seep through concrete. They make a special epoxy as a concrete sealer Is there a random mitigation scheme (venting) in place under the slab? I have a whole network of pipes tied into a vent stack and covered with plastic prior to pouring the floor
  20. dingbat

    Depth finder

    Mine does.......just not accurate
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