Hello all,
Thanks for having a great forum. I am new to boating and 2 strokes, but have worked on old cars for years and am a "fair to midlin'" shadetree mechanic. I recently bought a 93 Classic 40 which is an inline 4cyl with dual carbs. I rebuilt the carbs and fuel pump and changed the impellor and fuel filter. Ran great on the muffs and peed a good strong stream. I set the idle mixture screws to 1 1/2 turns out, cranked them in until stalling, then backed them out 1/2 turn - which left me at 1 turn out which is where they were before the rebuild. I took it out on the water and all seemed good - ran smooth, hole shot great, and though not super fast (pushing an old, heavy 15' tri-hull) seemed to me to be running great at WOT. Puttered back to the dock through the no-wake zone at just over idle and the motor locked up. At home I saw I had lost the vent screw and my lower unit had filled completely with water. Dropped the lower unit and the flywheel still wont spin. I can rock it back and forth about 45 degrees or so. Pistons still move up and down in cylinder when I rock the flywheel. Looks like I may have spinned the impellor on the shaft - it looks a little mishappen, but can't say for sure. Lower unit still seems right in fwd, rev, and ntrl (to my suprise).
My questions:
-Any hope for my power pack? I've read I might be able to free it up and get away with replacing rings. How should I precede with diagnosing?
-Does lower unit oil lube the water pump and explain my breakdown? Is my lower unit toast? I ran for a total of about an hour.
Any help would be greatly appreciated! I am low on cash for this, so can't afford a major rebuild. If the motor is toast, I would probably part it out and get another used one. I have 600.00 in this one.
Thanks!
Robert
Thanks for having a great forum. I am new to boating and 2 strokes, but have worked on old cars for years and am a "fair to midlin'" shadetree mechanic. I recently bought a 93 Classic 40 which is an inline 4cyl with dual carbs. I rebuilt the carbs and fuel pump and changed the impellor and fuel filter. Ran great on the muffs and peed a good strong stream. I set the idle mixture screws to 1 1/2 turns out, cranked them in until stalling, then backed them out 1/2 turn - which left me at 1 turn out which is where they were before the rebuild. I took it out on the water and all seemed good - ran smooth, hole shot great, and though not super fast (pushing an old, heavy 15' tri-hull) seemed to me to be running great at WOT. Puttered back to the dock through the no-wake zone at just over idle and the motor locked up. At home I saw I had lost the vent screw and my lower unit had filled completely with water. Dropped the lower unit and the flywheel still wont spin. I can rock it back and forth about 45 degrees or so. Pistons still move up and down in cylinder when I rock the flywheel. Looks like I may have spinned the impellor on the shaft - it looks a little mishappen, but can't say for sure. Lower unit still seems right in fwd, rev, and ntrl (to my suprise).
My questions:
-Any hope for my power pack? I've read I might be able to free it up and get away with replacing rings. How should I precede with diagnosing?
-Does lower unit oil lube the water pump and explain my breakdown? Is my lower unit toast? I ran for a total of about an hour.
Any help would be greatly appreciated! I am low on cash for this, so can't afford a major rebuild. If the motor is toast, I would probably part it out and get another used one. I have 600.00 in this one.
Thanks!
Robert
