Awesome video. Thank you for explaining everything in such detail. I have a crack on my engine block that sprays a fine mist of water out at high revs. It was repaird a year or so ago, but is back again. Hoping i don't have to replace the block! Any advice?
Hey great video, well done. I know it was made quite some time ago, but still relevant to many. Knowing the cooling system as you do, what are your thoughts why some dealers pump in some non-tax antifreeze before long cold storage, some say with the engine being self-draining, there is no need, thoughts?
An important note regarding the cooling system: if you ever have water in your oil, the FIRST thing you want to check is the exhaust manifold as those mating surfaces can corrode, and being that close to the cylinder head, with the valve overlap and aggressive cam lift of the MR-1 engine, it will ingest water from this point. I had this issue with my engine... but suspecting it was a head gasket, I removed the cylinder head before I removed the exhaust manifolds. On the other hand, if exhaust manifolds and gaskets look OK and the engine has good compression, then the next thing to check is the oil cooler/tank. Cap off the outlet hose with a fitting and a pressure gage, hook a garden hose to the inlet on the bottom of the tank, and using a valve, slowly bring water pressure up to around 15 PSI, then let it sit for 15-20 minutes. If there is no loss in pressure then the head gasket would be the next suspect. I say all of this to save anyone the difficulties involved in disassembling the entire top end to get to the head gasket, as the intakes/throttle bodies, valve cover, camshafts and caps must be removed before you can access the cylinder head bolts.
As others have said, thank you for making this video! It is extremely helpful to me while troubleshooting a pesky blockage that's causing an overheat issue.
Should water be coming out the nozzle on the side of the ski when the hose is attatched and running at idle? Nothing coming out of mine, checked the pipe which exist the ski, that is unblocked so no idea why nothing is coming out
On the hose i have water exiting through the jet pump and exhaust but none is coming from the fitting on the stern above the jet pump. I believe its from the engine block that passes the thermostat. After 10 mins on the hose it overheated and got to 250 f. What do you think the culprit could be? Any help would be great, thanks
I am gonna ditto @ The FPV Life 's comment. This is an excellent "mechanics view" of this system. I have been doing PWC's for a little over 6 years now. I am a diesel mechanic by trade, but I have been working on all things since I was about 10. I am 39 now, and I can tell you that this is the most comprehensive video to date that I have seen on this engine platform. I have a "03 FX cruiser, it had gotten water into the crankcase, via the water outlet pipe O-ring on the front of the cylinder head, and forced it's way under the valve cover gasket, due the grommet on the outer portion of the valve cover being quite the seal of integrity LOL. I fixed it after getting on HELL of a deal on it for $600. My family has enjoyed it for 4 years now, and I have always noticed there isn't a very good deal of water coming out of the exhaust flow indicator. I get a little under throttle, but last summer I notice it smelled like exhaust and had some vapor flow coming out of it. So I am thinking that the bellows joint is cracked. It's always been a freshwater machine, but the outlet pipe I had fixed years ago had quite a bit of corrosion in that bore when I repaired the o-ring. So the thought of the block and water passages being blocked concerns me. It has never overheated, and we pull kids on tubes like gang busters every summer. So that makes me feel a little more confident about this just being more of the exhaust joint issue. Because if it has exhaust gas pushing the water away in the joint, the water it just exiting out of the rear, instead of the indicator.
If they put arrows on the hoses to inform you which direction the water flows you might understand or color code them but that would make them more expensive and not necessary to a mechanic. Find a good mechanic and tip them for doing a great job. They will go the extra mile for you, stay late, rob a part from another job to float your boat, beg the parts guy to get what you need. Make a relationship with a good mechanic or technician yummy food , cold drinks on a hot day and a crisp twenty, The bill you pay at a repair shop is up to the manager not the mechanic, the work that is performed is. if you care about them by showing some gratitude and not complaining like the last guy trying to get it fixed for free they will take care of you so welcome to the VIP section my friends.
I want people to know that this was on my recommended in August 2021 with 75k. When future civilizations find this video, this comment will hopefully demonstrate the true power of the mysterious force know as RU-vid's recommendation algorithm.
