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  1. J

    Mercruiser 3.0 TKS - Hard to start when semi-cold

    Weird thing is that my boat starts really good completly cold, so seems like some functionality of the TKS is indeed working and heat power is not on max.
  2. J

    Mercruiser 3.0 TKS - Hard to start when semi-cold

    Yea, so the engine starts fine hot and cold (say the first start of the day). BUT the second start (like after you start it again after engine been off for 2-3 hours) is much harder. My starting procedure is always Neutral position, cold semi-hot or hot. Your comment makes sense from my...
  3. J

    Mercruiser 3.0 TKS - Hard to start when semi-cold

    Mercruiser 3.0 TKS is hard to start when it first has been running, then have been off for 2-3 hours. My suspicion is that the TKS system gets confused when the engine is quite cold, yet have ample of fuel in the carburetor so it applies the wrong amount of air-fuel mixture. It will always...
  4. J

    Filling coolant reservoir 3.0 TKS?

    I think distilled water is the most risk-free option at this point. I will change it before freezing tempratures anyway.
  5. J

    Filling coolant reservoir 3.0 TKS?

    Thanks! My coolant reservoir is yellow but my recovery tank is brown because it is completly clogged…. I will top up as described in initial post and go with water, fix my recovery tank and hose then drain the system in end of season and refill completly.
  6. J

    Filling coolant reservoir 3.0 TKS?

    Tested the boat for a long journey this weekend and think temprature were just fine (see pictures). But a bit worried about the coolant recovery tank condition. As you can see - coolat is right on bottom (cold engine). 1. I checked your steps but I heard it good be a problem to refill if I...
  7. J

    Worth flame arrestor upgrade for Mercruiser engines?

    Agree - I will. But question is should I go with the orginal - quite pricery or is Sierra any good? I looking for a long-term quality solution of course but which minimizes clogging.
  8. J

    Worth flame arrestor upgrade for Mercruiser engines?

    Doesnt flame arrestor affect engine at idle? A better may improve that as cleaning for cloggingnwith current one is a mess.
  9. J

    Worth flame arrestor upgrade for Mercruiser engines?

    I wanted to clean my flame arrestor today but think I accidently broke it. I think it will still work with some gluing and also because of the screw holding it togheter but looking for upgrade but maybe with some better quality. Are flame arrestors the same for all carburetor engines? However...
  10. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    Appreciate it! Thanks
  11. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    I can picture what you said of course. I was sincere though with seemed like you had a good setup. So just asked to see it in practice because I will do a completly reinatallation of both switches and battery set-up and placement.
  12. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    Maybe you can share a picture of your set-up. Seems like you know your stuff and this is indeed important :)
  13. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    Here is a good summary. Maybe a combo makes sense: https://keylockguide.com/lock-washer-without-flat-washer-or-lock-washer-with-flat-washer/
  14. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    I used these: https://www.boltsnmore.com/product/stainless-steel-lock-washers-304/ Don't know how they could damage ends, they will keep tight between threaded studs. Will not touch anything but top connectors. Should be good and will keep connection tight.
  15. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    I see now your point. Jesus when engine is running at low rpm there are really crazy vibrations down there.
  16. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    I know the cable setup is crap but wish it to survive just the summer. I accidently broke a negative when I was cleaning the battery so not only is it fragile. Didnt even realize I had dual studs on the batteries until you mention it. However -Thinking about also using these for battery...
  17. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    First and foremost, Thanks a lot alldodge. Couldn't be more thankful. I have reposition the ACR to come closer to battery - at least on "IN" on the switches. I checked for fuses and work fine with continuity test. I did however notice that there was no continuity on ACR Device between negative...
  18. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    I would like to survive the summer and replace with proper battery switch until the end of summer. I have updated the wire diagram as I done some more digging. What puzzles me now is if the "house battery" power shortage could impact power to engine being loss? After all, House battery is not...
  19. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    That makes sense. Because I have seen the ACR charge both before. That was before I ran into the starting problems for 3 weeks ago. But in this case it doesnt make sense. Because it was the now "good" starting battery with higher idle voltage that didn't get charged and the "bad" house battery...
  20. J

    Mercruiser 3.0 TKI engine crank half time - never starts

    An update for today: 1. I simply switched the places of the two batteries - I put the better 12.64v on starter and put the bad 12.44v on right side (house). Engine started! My conclusion is that 12.44 simply wasnt enough to start the engine and it was a bad battery. 2. Remember I told that I...
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