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  1. mtboatin

    7.4 gl PMDM no spark.

    Found my problem ! Traced all the wiring and found that the kill switch had a broken wire at a connector in the harness. We now have spark and she runs! Still not sure what happened at the dock with the fuel situation other than probably had a connection issue that was corrected while trying...
  2. mtboatin

    Top Speed Issues

    Alldodge, you're right after looking at my book. I apologize. Was using too much brain power to make sure I had all my steps in the correct order that I wasn't making it user-friendly.All Dodge, Traced all the wiring and found that the kill switch had a broken wire at a connector in the...
  3. mtboatin

    7.4 gl PMDM no spark.

    I have this posted in a another post concerning top speed and RPMs but since this is unrelated I thought I'd start a new one. I ran out of fuel for the purpose of getting four year old fuel out. Had to be towed in by a buddy . Each time I cycled the key and pump the throttle to Prime the carb...
  4. mtboatin

    Top Speed Issues

    So the saga continues. Slowly have increased a little bit in ease of starting hot, minor increase in speed, and slight RPM increase. Now I'm seeing about 3850 RPMs and 34 mile per hour . I even checked the throttle linkage and adjusted it to make sure the car was getting Full Throttle . Ran out...
  5. mtboatin

    7.4GL temp sender info needed

    Checked the temperatures after running for an hour plus. 156 degrees at temperature sender at top of water pump. A little higher up at the base of the intake and thermostat housing got about 163 degrees. So actual engine temps seem to be all good. Guessing I have a gauge issue. Gauge still only...
  6. mtboatin

    Old Lowrance 3200 depth finder help

    I have a 1994 Cobalt 272 with an old Lowrance 3200 depth finder that seems to be on the blink. I called Lowrance and Cobalt with not much help. Looks like I will replace the whole unit with a Hawkeye DT2B. I'll have to make some type of trim to take up the odd size hole in the dash. I may...
  7. mtboatin

    7.4GL temp sender info needed

    I'll check the temperature on both the water pump and the intake below the thermostat housing. This sender screws into the top of the water pump housing. Also purchased two new OEM thermostats which are 160s. Swap it out for the second one with no difference.
  8. mtboatin

    7.4GL temp sender info needed

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  9. mtboatin

    7.4GL temp sender info needed

    Got out today with my new temp sender installed and little to no difference. 120 or slightly higher after running for hrs. If ground wire at sender gauge goes full hot. Possibly wiring resistance or gauge problem? Not sure what or how to check next.
  10. mtboatin

    Lowrance 3200 depth sounder - HELP

    dlighttx, I know this is an old post, but I just purchased a 1994 272 Cobalt with the same unit that seems on it's way out. Was curious what you found or ended up doing.
  11. mtboatin

    1994 cobalt 252

    I know this is an old thread but in case it helps someone else, my 1994 Cobalt 272 exit hole is beneath the swim platform. Only way to see mine is to go under water and pop up in the cavity under the swim platform. My boat has the power swim platform so may be different then most. I can't...
  12. mtboatin

    Top Speed Issues

    I bought about $150 worth of quality additives of every kind. Stable, royal purple, sea foam concentrate, techron, blue moly, gumout, etc. I mixed quite a few together keeping the overall amount per gallon fairly close. I did some research and found that this won't fix the gas that has broken...
  13. mtboatin

    Early Cobalt Seat Help Needed

    My 1994 Cobalt 272 pedestal seats have no plastic bushing between the column and seat base. Pretty medieval working set up. Trying to determine if they originally had a bushing of some type in there and if so what type. Also the main seat base that has the upholstery and cushions stapled to...
  14. mtboatin

    Servicing DP-D1 lower unit

    At this point I think I'll go by the dipstick reading and drain some out. I guess that's what it's there for right.
  15. mtboatin

    Top Speed Issues

    QBhoy, I would hope and think the same but if RPMs don't continue to improve with good fuel and a little tuning, B1's may be my only other option to get them higher. Hole shot is impressive the way it sits. Would love to see this boat at high 40's low 50's. Probable wishful thinking @ 6000lbs...
  16. mtboatin

    7.4GL temp sender info needed

    Played it safe and returned NAPA VDO sending unit and ordered OEM after trying to contact VDO technical center, leaving a voice message due to them working remotely and not hearing back in 24hrs.
  17. mtboatin

    7.4GL temp sender info needed

    Went to NAPA and had a excellent parts person do some digging. My Cobalt is running VDO gauges. The temp goes from 100 to 250. He had a VDO sending unit (# 701-1813) that physically is super close to identical and on the box says 250 degrees. May give it a try for $30. I couldn't see any...
  18. mtboatin

    7.4GL temp sender info needed

    Bruce, looks spot on! I was all over that diagram but couldn't get iboats, my dealer, or VP direct to verify anything. 31 actually points to the thermostat housing but states it's a sensor. 32 points to what I believe is the sensor but description says it's a hose. Thanks. Also noticed on...
  19. mtboatin

    Servicing DP-D1 lower unit

    Serviced my lower unit with Amsoil. Online info said it takes about 2.7 qts. Drained unit, removed dipstick and back fill plug and filled from the bottom. My question is do you fill till it comes out the back plug to gauge level. This was my understanding. But it took a little over 3 qts...
  20. mtboatin

    7.4GL temp sender info needed

    Hello all. I recently purchased a 1994 Cobalt 272. This boat is equiped with a 7.4 GL PMDM, DP-D1 drive, and B2 props. Temp gauge reads 120 at most. Found original sender bad. This is the one that screws straight down into the water pump at top center. Can not find a part number any where...
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