z1nonlyone
Seaman
- Joined
- Apr 20, 2010
- Messages
- 58
Hi, I have posted before about our "water in the oil" problem that turned out well! We took out boat out for the first test after performing many repairs includeing, changing oil and filter, replacing outdrive water pump and shift shaft seal, rebuilding starter motor, correcting the incorrect wiring on the alternator, new battery, etc...
The first test was a success!! After almost 3 hours running at a plane, with occasional WOT, we checked the oil and found NO water contamination. This confirms our suspicion that the boat was submerged rather than frozen. We could not be happier at this point. At the end of the day, we were heading back and saw a day cruiser jamming along and figured we would see how our boat goes. Well, we moved up to WOT and we were keeping up with it, if not just a little faster! Proud as a peacock! After about 1-2 minutes of this, i noticed a "wavering" of engine RPM. It would seem to loose speed on and off. I was watching the rpm (the tach has been unreliable), the oil presure, temperature the whole time. As far as the rpm is concerned, it was almost pegged at 5 grand, the temp was at or under 175, oil presure over 40 psi,,,,bacially no problem. After throatleing back, the engine ran fine, no noises, temp was fine, no oil leaks, no water leaks, etc.. My buddy is a certified mechanic and also detected no obvious engine problems. So, I slowly throtled up again and this time it sounded like the engine would temporarily "race",, not consistant, just on and off. This was with partail throttle, before on a plane. My buddy said he felt a vibration, I did not. At this point we headed back to the dock and back on the trailer. I examined the prop today and have included pics. I am hoping that its not the drive coupler. Any opinions will be appreciated.
1997 CHaparral 1930 bow rider
5.7 liter Mercruiser with EFI
Two passengers under 115 lbs
Two Captains 200-230 lbs ea.
Two mangey mutts 25 lbs each
1 aluminum prop 14.5 dia. x 19 pitch
I could not find any glarring problem with the prop and internal parts.
We did notice that the boat came with "spare parts" in the form of additional prop internal plastic hubs, bronze washers, etc....
The first test was a success!! After almost 3 hours running at a plane, with occasional WOT, we checked the oil and found NO water contamination. This confirms our suspicion that the boat was submerged rather than frozen. We could not be happier at this point. At the end of the day, we were heading back and saw a day cruiser jamming along and figured we would see how our boat goes. Well, we moved up to WOT and we were keeping up with it, if not just a little faster! Proud as a peacock! After about 1-2 minutes of this, i noticed a "wavering" of engine RPM. It would seem to loose speed on and off. I was watching the rpm (the tach has been unreliable), the oil presure, temperature the whole time. As far as the rpm is concerned, it was almost pegged at 5 grand, the temp was at or under 175, oil presure over 40 psi,,,,bacially no problem. After throatleing back, the engine ran fine, no noises, temp was fine, no oil leaks, no water leaks, etc.. My buddy is a certified mechanic and also detected no obvious engine problems. So, I slowly throtled up again and this time it sounded like the engine would temporarily "race",, not consistant, just on and off. This was with partail throttle, before on a plane. My buddy said he felt a vibration, I did not. At this point we headed back to the dock and back on the trailer. I examined the prop today and have included pics. I am hoping that its not the drive coupler. Any opinions will be appreciated.
1997 CHaparral 1930 bow rider
5.7 liter Mercruiser with EFI
Two passengers under 115 lbs
Two Captains 200-230 lbs ea.
Two mangey mutts 25 lbs each
1 aluminum prop 14.5 dia. x 19 pitch
I could not find any glarring problem with the prop and internal parts.
We did notice that the boat came with "spare parts" in the form of additional prop internal plastic hubs, bronze washers, etc....
