Logo
FULL SITE MENU

Recent content by RPL

  1. R

    BF 9.9 Dies soon after starting

    Ran a few more checks. The wires running from the overheat sensor to the cdi plug check out good. With a warmed up engine, measuring across the pins of the sensor was 550 ohms same as was measured at the cdi plug, tried moving wires and wiring harness while measuring and reading remained the...
  2. R

    BF 9.9 Dies soon after starting

    I just measured the original sensor ; at room temperature = 2.5k ohm after heating up sensor with heat gun reading is .4k ohm so yes resistance drops as sensor heats up
  3. R

    BF 9.9 Dies soon after starting

    yes oem sensor
  4. R

    BF 9.9 Dies soon after starting

    I'm think I will try both suggestions starting with checking continuity of wiring from sensor to cdi plug, and if that checks out then do a coolant line flush light,
  5. R

    BF 9.9 Dies soon after starting

    New coil was installed, confirmed that I had spark to both cylinders, started it up and monitored that both cylinder heads were getting warm evenly but engine cut out just like before after a few minutes. Found that disconnecting the overheat sensor when it started to stumble would make it...
  6. R

    BF 9.9 Dies soon after starting

    New plugs were put in without any change Coil primary is within spec at.04 ohm, secondary is not at 8.4M ohm ( should be 23k to 34k) if I measure plug wires individually they 11.2 M for upper plug and 9.8 K for lower Looks like coils are sold with the plug caps so might not matter about wire...
  7. R

    BF 9.9 Dies soon after starting

    Thanks for the info I will be back at the boat midweek to do the tests
  8. R

    BF 9.9 Dies soon after starting

    Looks like it's just running on one cylinder, I pulled the bottom plug wire and it ran like before, with the top plug wire pulled it won't start up, top cylinder is warm and bottom cylinder is not. Coil or anything else to check? Thanks guys for the help!
  9. R

    BF 9.9 Dies soon after starting

    Are the 23°C lower and 60°C upper temperature readings being seen as the engine rpm drops? What I measured was 23 lower cylinder and 60 upper temperature right next to the plugs just after it shut down, I will have to repeat this test as the room temperature statement is correct. Not sure about...
  10. R

    BF 9.9 Dies soon after starting

    I thought I found something as a few of the impeller fins were not facing the correct way. I replaced the impeller but the same problem happened. I measure temp with an Ir gun beside both plugs, lower was 26deg C, upper was 60 deg so looks like there's a blockage. The procedure I read for a...
  11. R

    BF 9.9 Dies soon after starting

    Thanks, some good pointers coming in, I will take a video of how it sounds next time I'm at the boat
  12. R

    BF 9.9 Dies soon after starting

    Thanks for the responses. I do have an IR gun so will try that tomorrow when I'm at the boat. I just picked up an impeller kit and it's due for replacement so that's first on the list. This motor was run in salt water by the previous owner so I'm looking at doing a flush with some barnacle...
  13. R

    BF 9.9 Dies soon after starting

    Thanks for the link, Manuals are very reasonably priced So if it is fuel related and basically running out of fuel, would I not have to reprime using the primer bulb? This is not the case, primer bulb is always stiff. Motor starts right up after the shut down and sounds good for the next minute...
  14. R

    BF 9.9 Dies soon after starting

    From a cold start, after it warms up for a few minutes, it will run for 2 or 3 minutes under load before it cuts out, it seems like once it's warmed up the time it will run for gets shorter and shorter, but always fires right back up without me doing anything How to best check for blockage?
  15. R

    BF 9.9 Dies soon after starting

    The impeller was replaced 2 years ago, fuel filter, thermostat, plugs and carb cleaning was just done
See more
Back
Top