95 bayliner reflexx sport jet 90 engine issues

[Daremo]

I recently got a 1995 Bayliner Reflex with the Sport Jet 90 engine. It was my stepfathers and he had bought it and was going to fix it, it wasnt running when he bought it. He passed away in Oct and I ended up with the boat.

I have a plenty of experience with engines, having always done my own work on my Audis and I repair medical equipment for a living, so I am very good at troubleshooting and repair. I just need a little advice with this boat.

In looking the boat over, the wiring harness looks like a rats nest. Someone built a new one and its a horrid mess. I have seen pics of other Reflex Sportj jet 90s and they look nothing like the wiring disaster I appear to have here.

So I will need to figure out if the harness was even built correctly. My question about this is can/should I just try to find a used harness somewhere? If so, anyone got some suggestions on where to try?

My other major problem is this one. The boat ended up with snow that turned into water in it over the winter. I covered it after the snow had melted and mostly refroze... the end fact is, it remained filled with water up to the lowest carb throat for about 3 months and I just was able to drain it about a week ago. The air intake was still on the motor and i didnt realize water could seep into the carb throats without being high enough to go in through the air intakes at the top of that cover. I pulled the plugs and turned the motor over by hand. Water shot out of the bottom cylinder. I attempted to get as much water out as possible and put a decent amount of marvel mystery oil in through both the carb and into the cylinder. I dont know how long the water was in the motor. It could have been all 3 months or it could have been much less... I also dont know how much was really in there. I have compression tested all 3 cylinders and all are at about 90 PSI. So, should I just resign myself to fully tearing this motor down and seeing whats going in there or not?

Thanks for the help!

 

[Faztbullet]

Re: 95 bayliner reflexx sport jet 90 engine issues

TEAR IT DOWN!! You have lower main bearing, rod bearings, wrist-pin bearings and crankshaft that are most likely rusted. Just do a search for BIA wiring and it will give colors to repair your harness

 

[Daremo]

Re: 95 bayliner reflexx sport jet 90 engine issues

TEAR IT DOWN!! You have lower main bearing, rod bearings, wrist-pin bearings and crankshaft that are most likely rusted. Just do a search for BIA wiring and it will give colors to repair your harness

**UPDATE**

I tore the motor down. Pulled the lower piston and inspected the crank journal, connecting rod, rings, and rollers. No rust found at all. Only rust spots I found anywhere were very small minor surface ones on the counterweight to the crank journal.

One thing I am curious about, the #3 piston (bottom) has some pitting/dents? or marks in the combustion chamber of the head. Almost as if it had been struck with small objects... sand? small rocks? Or perhaps its poor casting of aluminum? Its not excessively deep, its just different than the other two chambers and I was wondering what the cause might be. Anyone got any thoughts on this? Though, since this is a 2 stroke engine, I would expect to have found sand in the bottom of the motor since thats part of the intake path and I found nothing in the motor.

Overall, the motor is in good shape, I haven't found any other issues other than the entire wiring harness/starter solenoid to be a hack job with an automotive solenoid that I am pitching out and replacing with the correct unit. I have rebuilt 2 of 3 carbs and am waiting on the last rebuilt kit. Replaced all the gaskets already and I should be putting the motor back in the boat this weekend.

 

[funpilot]

Re: 95 bayliner reflexx sport jet 90 engine issues

i.e. pitting: probably had a ring break and ding up the head in the past. You're lucky on the bearings, etc. with the submerging. I rebuilt a 120 which had been submerged, and it was a mess. The wiring haness is pretty simple. You could build your own new one, or find a parted out boat. You will still need to check everything out though for continuity.

You know for running the engine in the boat out of the water, you need to hook a hose with medium flow to the flexible hose to the jet pump. Don't exceed about 1800 rpm on the hose.

good luck,
fp