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Recent content by _jp

  1. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    Thanks for the info (y)
  2. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    I have a rough idea, but in all honesty I'm learning more about the engine and electrics side as I go. From the various information I have read, the issue was related to the high-amps and heat relating to either a failing starter motor, cables, or connections. I have just fitted brand new...
  3. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    I think it's the original starter (2006 ish). I was going to replace it with an OEM one rather than an aftermarket. Do the newer OEM ones use the gear reduction do you know? Jumper cables got it turning over, after I had spent some time on it. Then it would turn over without them. Note taken...
  4. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    Thanks for clearing that up. I've seen multiple sources contradicting themselves and found myself going down a rabbit hole. I'm going to replace with fresh cables and i'll go up one size for good measure. Thanks
  5. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    It's a bit intermittent, sometimes it cranks, some times it clicks and then the electrics die. Wait a while, then you can attempt to turn it over again - the amps are causing heat. It's a brand new battery and I cleaned all the terminals and ground lug on the block, etc. Only thing I haven't...
  6. J

    Mercruiser 4.3L Battery Cable Lengths & AWG Sizes?

    Hi all, My Maxum 1800 SR3 has a Mercruiser 4.3L (Carb version) and I'm having a little trouble starting it. Narrowed it down to either the Starter Motor and / or Battery Cables. I've read that battery cables should be the same length, even if one needs to be loosely looped. My Positive cable...
  7. J

    Trouble Starting & Tripping Electrics?

    Hi, yes that's correct on how it's set up. The fuse hasn't blown, wait a while and the electrics will work again. But, that fuze seems to be where the electrics sometimes fail when attempting to start, as I can bridge it with a separate cable and the blower and other electrics work. Upon...
  8. J

    Trouble Starting & Tripping Electrics?

    Hi, thanks for the quick reply. Just to check, are you saying that I have it wired up wrong on mine, or that they're all wired up this way from the factory and there's a better way? What would cause the electrics to trip, is the block fuze "thermal protected", as i can get it working again...
  9. J

    Trouble Starting & Tripping Electrics?

    Hi All, 2006 (ish) 4.3L Mercruiser with Carb and Thunderbolt Ignition Boat was running great last year. Just attempted to start the boat for the first time this season (on earmuffs water hookup). It turned over a few times sounding normal, then the electrics went dead. Nothing on the ignition...
  10. J

    1995 Mariah Barchetta 182 with 4.3LX and Weber marine carb start issues advice needed

    Are you following the "normal" cold start procedure? 1. Neutral 2. Crank for 5-6 seconds to prime 3. Two full pumps of the throttle 4. Throttle in slight forward position 5. Crank again to start
  11. J

    Mercruiser 4.3L Cranks, Has Sparks & Fuel, But Will Not Fire Up

    Hi all, I wanted to post a quick update and a summary of the fix, as I hate posts that don't share their outcomes - hopefully it's helpful to others. We managed to fit in a trip to the coast (Christchurch, Dorset, UK) for a full water test this week, which went great and we got very lucky with...
  12. J

    Water Pipe Temperatures on 4.3 Mercruiser - Hot / Cold?

    Thanks @AllDodge for the additional diagram and @Dieter for the written explanation, that doubly put's my mind at ease. I'm hoping to water test the boat this week and will keep a close eye on the gauges. I recently found the alarm buzzer under the dash had been disconnected by one of the...
  13. J

    Water Pipe Temperatures on 4.3 Mercruiser - Hot / Cold?

    Thanks @AllDodge, I think I'm getting my head around the basic direction of the waterflow now (y)
  14. J

    Water Pipe Temperatures on 4.3 Mercruiser - Hot / Cold?

    Thanks @kghost, i'll add that to my "tool box" list.
  15. J

    Oil change issue, Merc 4.3L

    I drained 0.2 Litres today and it was bang on the mark after, thanks for the info @GMcInroy, don't think I would have spotted change.
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