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  1. offshorejason

    AQ125/270 Still overheating (PLEASE HELP)

    @captmello The boat has never been in salt water (that I know of) and shows no signs of it. I have run with muffs and in the water and get nothing to the heat exchanger (raw water side). It overheats while at idle. I just cant seem to get it to pull water through the raw water system. I have...
  2. offshorejason

    AQ125/270 Still overheating (PLEASE HELP)

    @Lou C thank you for that! I have run a hose directly into the exchanger and it flows out of the exhaust making me believe the line to, and through, the exhaust is not clogged. I don't think the closed loop side has any issues at all. The raw water side seems to be the issue. I am simply not...
  3. offshorejason

    AQ125/270 Still overheating (PLEASE HELP)

    please forgive the crudeness of this but it really is this simple of a system. The coolant side is separate from the fresh water side and it is clear that the problem is the fresh water side not pulling.
  4. offshorejason

    AQ125/270 Still overheating (PLEASE HELP)

    Thank you for the reply! I appreciate you! I have read that people open their heat exchanger and get water flowing and I have not ever seen any coming from it. I have not used a clear tube for any of it. I would have to find some large diameter clear tubing... The plumbing is straight forward...
  5. offshorejason

    AQ125/270 Still overheating (PLEASE HELP)

    Ok guys, I've read just about every thread I can find seeking solutions but I'm desperate and not finding a solution. I have an AQ125 with a 270 outboard and my engine is overheating. When I remove the cap on the heat exchanger, I never see moving water. Here's what I've done: -Brand new...
  6. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    I wish it did. My going theory is there's a leak from the suction points on the outboard to the impeller. -I've isolated the heat exchanger/exhaust/contained engine coolant side and it is solid. The thermostat has been replaced, tested, and works. By running the hose directly to the heat...
  7. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Disregard my last, I've isolated the problem to the fresh water side. I stuck a hose in the fresh water opening for the heat exchanger and ran it. Didn't get close to overheating. This proves the problem is on the fresh water pickup side. I will take it all apart again and try to find leaks
  8. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Tried again and it failed again. Anyone ran theirs without a t-stat installed? It ran great as it heated up, and at one point I could tell the thermostat opened because it cooled rapidly, and then it stopped cooling again.
  9. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Ok, double feed ears, new hoses and connections all the way to the heat exchanger, still no water out of the exhaust. Removed the exchanger and cleaned it. The only thing I haven't done is remove the circulation pump but that's on the coolant side and it wouldn't stop fresh water from making...
  10. offshorejason

    Volvo Penta AQ125/270 not starting after cooling system rework

    I figured it out, the wires were in the wrong order in the distributor
  11. offshorejason

    Volvo Penta AQ125/270 not starting after cooling system rework

    No sir
  12. offshorejason

    Volvo Penta AQ125/270 not starting after cooling system rework

    I recently reworked and replaced almost my entire cooling system on my AQ125/270. Prior to working on it, the engine fired up and ran like a dream. Now, I get a puff of smoke from the exhaust, and the carb, every once and a while during cranking and the engine won't start. The last thing I did...
  13. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    After doing some deep YouTube research, none of the other AQ125A engines have the oil cooler installed. I will be filling the manifold beneath the thermostat with coolant and checking on the circulation pump. *fingers crossed*
  14. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Ok, I will transition back to the ears and get an expanding plug for the drain hole. still wondering about coolant.
  15. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    The tub covers the outboard and all it's suction points. I have checked the impeller three times and it is in fantastic shape. I just replaced it to be safe and the old one looks brand new. The ears I used previously didn't work well as there is a hole on the bottom that needs to be plugged...
  16. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    I typically run from a large tub full of water. I have another question (sorry if I am frustrating you guys, I am very much big on learning and DIY). I took off the expansion tank and the thermostat the other day and the thermostat is brand new. Should there be coolant behind the thermostat...
  17. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Yeah, I have antifreeze in it. The radiator system is air tight, no leaks. I just rebuilt the fresh water pump and it seems to be good but I'm not seeing water at the exchanger (where the fresh water pumps to). I have no clue why it's not slinging water like crazy, it's all checked and rebuilt...
  18. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Awesome, I will take that all apart and check it out. Did you still see water moving in the exchanger?
  19. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Thank you for the response. Wouldn't I be seeing water at the exchanger if everything to that was functional?
  20. offshorejason

    Volvo Penta AQ125/270 overheating raw water not pumping

    Ok guys, I've read just about every thread I can find seeking solutions but I'm desperate and not finding a solution. I have an AQ125 with a 270 outboard and my engine is overheating. When I remove the cap on the heat exchanger, I never see moving water. Here's what I've done: -Brand new...
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