filschoppin
08-05-2020, 10:25 PM
Hi all, happy Supra owner new to the forum. My boat is a 97 Comp with a 351 H.O. PCM according to the tag on the motor. History is unknown, I traded it for a bike. It looks almost new, sounds amazing and crazy fast. Since I've had it I only changed the oil and repaired minor things here and there, has run extremely well until yesterday. Moving down the lake at a good pace I noticed temp climbing fast. Dropped to idle and things started smoking. I turned the motor off and scanned for options. I just happened to be near a closed ramp where I was taking my littles to swim. Jumped out and swam boat to the dock. Called a friend who took me to my truck and I was able to convince the guards to let me in to collect my boat. It was not cooling fast but while waiting for her I decided to see if it would start. It had a sluggish crank, then just a click.
r
Back in my garage today and tried to start it. Just click. Bypassed the solenoid, just click. Pulled the spark plugs and found water in two cylinders. I was able to turn motor over by hand and tried to use the starter to push water out. No go. Pulled starter and bench tested- it's toast. Back to original problem, for some reason I pulled the hose off of the top of the impeller housing expecting to find fragments of rubber. Looked good from the top, I turned the motor over but did not see the impeller move at all. Belt was turning pulley, but not impeller. Removed it and opened it- to my surprise it looks new (PO said he had it and the water pump replaced last season. I can see a new gasket on thermostat so I assume so). I'm puzzled and looking for advice on where to start. Obviously will drop oil and am confident if the rings are not melted or bearings trashed I can get it running again but I'm new to impellers and don't know what to think about it not spinning but after I took it apart and put it together I can see it spin. I looked at the oil cooler and it did not have anything blocking it so I'm confused as to why it overheated and where I should start assessing for damage. Any pro's mind sharing some advice? Thanks.
r
Back in my garage today and tried to start it. Just click. Bypassed the solenoid, just click. Pulled the spark plugs and found water in two cylinders. I was able to turn motor over by hand and tried to use the starter to push water out. No go. Pulled starter and bench tested- it's toast. Back to original problem, for some reason I pulled the hose off of the top of the impeller housing expecting to find fragments of rubber. Looked good from the top, I turned the motor over but did not see the impeller move at all. Belt was turning pulley, but not impeller. Removed it and opened it- to my surprise it looks new (PO said he had it and the water pump replaced last season. I can see a new gasket on thermostat so I assume so). I'm puzzled and looking for advice on where to start. Obviously will drop oil and am confident if the rings are not melted or bearings trashed I can get it running again but I'm new to impellers and don't know what to think about it not spinning but after I took it apart and put it together I can see it spin. I looked at the oil cooler and it did not have anything blocking it so I'm confused as to why it overheated and where I should start assessing for damage. Any pro's mind sharing some advice? Thanks.