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Found 3 results

  1. I have a PCM ZR409 engine, version without antifreeze (water circulates in the block and manifolds). The problem started two years ago. The symptoms are the same as here: http://www.centurioncrew.com/index.php?/forums/topic/11155-fault-codes/ Also errors SPN: 441, 442. This year, after reopening, first these errors were issued even at idle. After replacing the impeller and thermostat, the problem began to appear only on the go under load, as in the past two seasons. When I ride a wakeboard, or when I go with a left wave for a surfer (the load is more), I get errors on overheating of one or two collectors. Occurs after approximately two minutes of wakeboarding or five minutes of surfing. At the time of the error, the emergency mode is activated for a short time, after a few seconds of reset, the power itself is restored. This is enough for the wave to break and the rider to fall. But if the engine is turned off at this moment, the water circuit starts to go crazy: it makes sounds of hissing or gurgling in the area where water enters from the v-drive into the thermostat housing, and pressure drops in the cooling system are felt on all soft hoses, video How soft hoses twitch and shrink for a second. As if the water boils in the hoses for a second, then it does not boil for two seconds, and history repeats itself. After ten seconds of idling - everything is fine until I again give the load. The following work was carried out: replacing the impeller assembly with the housing, replacing the thermostat assembly with the housing, checking all the hoses, flushing the engine and transmission heat exchangers, flushing the manifolds with acid (now they shine like new inside), replacing the emwt sensors, checking the v-drive on object of contamination. Can exhaust risers affect overheating in this way? Has anyone encountered such a problem?
  2. My 2015 ZR409 exhaust manifolds are overheating then my boat goes into some kind of limp mode. My ZR409 has coolant in the engine block and fresh water in the manifolds with a heat exchanger in the rear. No engine light is coming on and the water temp is reading normal. What I think is happening is the exhaust manifolds are getting clogged up? When I pull the plugs on the manifolds I get a lot of debris coming out with the water that looks like silt or hard water that has been baked onto the inside of the manifold then has flaked off. This is the second time this has happened, the first time was only about 20 hours prior. Do you think I'm correct in assuming that the overheating is due to the manifolds getting clogged? If so is there anything I can do beside pulling the four plugs and removing the debris? Could my issue be something completely different and if so what can I check?
  3. I blew a serpentine belt this past weekend. When I took a look at the area where the belt goes, I noticed that the engine water pump (not fresh water pump) pulley appears to be missing a large nut. The pulley feels tight on the shaft, I’m guessing that it’s a press fit. Does anyone know if a nut is supposed to be on here? See pic below (it’s the 6 inch black disk in the middle of the pic with the threaded shaft sticking out of it). I can’t see any other way that this pulley is currently staying on...
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