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  1. sam am I

    3 battery isolator

    Old school trick .........Add a comp diode (see Dodge's edited drawing below w add-in comp diode) which will raise the alt's output by about 0.5V (14.4V + 0.5V = 14.9V) making up for the drop the iso has to each battery........It won't track 100%, 100% of the time, but...... For example, when...
  2. sam am I

    Merc 700 starter solenoid issues

    Diffidently could be as Dodge says but, I'd wager 2 bits the solenoid contacts are worn (see below) and the plunger (middle pic) is hanging up in the grooves....If the plunger hangs in the contact groove, the starter will continue to run when the key is shut off. This groove coupled with the...
  3. sam am I

    Tachometer/Trim Gauge

    Agree with gm, pop it open and lets have a look see eh?.........Collectively, we have managed to fix a few thing around here, even remotely if you're game ;) Could spray a wee bit of electrical contact clean from the outside down in the sector switch and index the selector switch it back and...
  4. sam am I

    Do I really need a 4 way switch ?

    Have a picture of your "SCR"? as I'm not sure why this device would be in your boat, As Dodge stated, a "SCR" is typically a acronym term for a "Silicon Controlled Rectifier". A thyristor used typically to control AC current.......... Although SCR's can be used in DC circuits as a switch with...
  5. sam am I

    Multiple Batteries, with Multiple Bilge Pumps

    I run something similar to this and have my three batts OR'd to my bilge pumps so as to prevent what you experienced. I simply beefed up the OR'ing diode array and added a house path as you requested....... m50-diode-series-power-modules.pdf Realize there will be a max current load on the...
  6. sam am I

    Diode on 07 60 EFI

    Protection diode..............In this case/config, it's designed to clamp any negative going(polarity) induced voltage spikes coming off solenoid's drive coil (#3) to around -0.6V...........w/o these clamping diodes when the ig switch's start position contact opens (and in similarly configured...
  7. sam am I

    1 click from starter solenoid

    Well if it clicks and you have 12V on the battery side BIG stud and nothing of the starter side BIG stud, that implies the solenoid is bad............Hmmmm, what happens if you jump across the both the big studs with a screw drive? Also curious about the type of solenoid you have..........See...
  8. sam am I

    Bilge pump won't shut off

    I do think/agree its float switch #2 hung, that is if I guess the wiring correctly.............See below, If SW2 is closed (hung up) and you cut the wire "BLK-1b" feed to pump #1/M1, both pumps should still have been running as you noted due to "BLK-2b" still feeding +12V to "BRN-1" and...
  9. sam am I

    Multi Connection Battery Terminal

    Correction....I guess I bought the 200A's, had a spare rat holed. I mounted heat sinks to them but, not really needed if running less than 60/70A with Ron @ 0.75 milliohms. Could use a flat piece of aluminum if need be thou.
  10. sam am I

    Stereo Receiver Replacement Fail . . .

    ...
  11. sam am I

    oil pressure gauge weirdness

    If you don't see a wiring issue right off the bat, As a static test of the gauge you could always use a jumper wire and short the "S" terminal to ground and deflect the needle fully.....but that can give a indeterminate at times depending on how things are failing, If the water, fuel and oil...
  12. sam am I

    Not Sure On Two Counts Here.........

    Not sure this counts as "While Boating/Fishing" but I was "boating and fishing" when I took this pic the other day when i sped past this.........I'm still not 100% on how but, perhaps some things are better left unknown.
  13. sam am I

    How many have deleted the oil mix system on their Black Max?

    92 175 ran it stock 25yrs spring/summer/fall fishing (catches still as of a few days ago ;)) mainly, no problems. Rebuilt the motor (bore, pistons, rings), no abnormal sign of wear anywhere in oilier system, lucky? Nah, just kept good care of the motor, never made a race engine out of it...
  14. sam am I

    Minn Kota 3hp...anyone have one?

    jeep, Sent the board and switch out (tracking number sent in PM, used bigger box, can you get a refund on the pre-paid label? I included the label in the bigger box I sent). The board works just duckie and a half after a good run on a 10A load at 12V, solid and cucumber cold in...
  15. sam am I

    Minn Kota 3hp...anyone have one?

    Received board, Two things, 1) Removed solder bridge that was shorting across Pin 7 U3/cathode D3 and Pin 4 U2/R9/C2 nodes, that took down oscillator. No oscillator, no work at any voltage......... 2) Board powers up/PWM circuity all works fine BUT requires 16+ V applied due to U2 is...
  16. sam am I

    Minn Kota 3hp...anyone have one?

    Very good, will let you know when received and yes, I'll definitely will let you know what I find. I might tease you on the solder job but, like most everything else, it's a learned thing so I'll go easy........ I'm also going to update the drawing Rev. from 1.3 to 1.4 here reflecting the U2...
  17. sam am I

    Mercury 2001 50hp 4stroke, temperature sending unit removal and installation

    Should more or less just pull out, perhaps the rubber boot is hanging it up?
  18. sam am I

    Minn Kota 3hp...anyone have one?

    Hmmm. Measurements with flex not press to flex pressed on a working board............... 1 - 0.65V to 1.50V - 3.00V (flex area press dependent) 2 - 2.10V to 2.50V 3 - 0.00V to 0.40V 4 - 0.00V to 2.00V 5 - 0.00V to 0.00V 6 - 0.00V to Varies (PWM/meter bandwidth dependent) 7 - 0.00V (C4/5 fully...
  19. sam am I

    Minn Kota 3hp...anyone have one?

    So cool......... Apologies, The FET's are Q4, Q5, Q6, Q7 (See post #64) Following the above (step #3, post #103) quoted ohm measurement test, place AND KEEP the meter's + (or -) probe on pin #6 of U2 then place the meter's - (or +) probe directly and successively on EACH FET's pin #1 (see...
  20. sam am I

    Minn Kota 3hp...anyone have one?

    Definitely HUGE move forward... Excellent! You could take a leap here BUT, considering the board is coming back from the grave, I'd typically approach it just a little more conservatively. Also, I'm thinking it would be advisable to double check that all four driver FET's are still wired in...
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