Re: Strange Issue With Driveshaft After Changing Water Pump
Vibration not normal. Tstat starts to open at 143F with full open being 10-15 degrees more. Not much you could have done to screw anything up if you had the manual and followed it. Biggest problem is usually the shift linkage gets mis-aligned but you said that went back together ok, or you can't get the drive shaft back in the last 1" because the splines aren't lined up; or the last 1/4" because you put a blob of grease on top of the drive shaft and it's keeping it from seating all the way in the powerhead. Apparently that went ok too. The water tube is fixed now so that's hard to screw up, but it is not a vibration causing element and you said your temp was 130, low as Bosun mentioned and yes it is. You very well didn't give your engine time to warm up to stat open temp.
Drain your lower unit oil and check color and for debris. You should have a magnet on your lower....drain screw. A little bit of metal filings are normal. Oil should be dark blue-black if using Quicksilver...no milky, or chocolate looking oil. Good time to change it anyway. WW has it in the Quicksilver brand, premium grade, with the pump and all.
What are you running for a prop and what have you possibly hit with it? If all else checks out, I'd take a close look at the prop. What type, material and pitch? What boat are you running it on? 1100 is just over idle rpms.
On mine, when I use my heavy SS prop with a lot of pitch (24P Ballistic XP with engine gear ratio of 2.33) I get what's called "clutch dog rattle" at and around that rpm. The clutch dog is around the prop shaft in the lower unit and is what connects with F, R, or no gear to drive the shaft when you select a gear with the shift lever. The big prop and the engine get out of rpm sync and it causes the prop pressure on the prop shaft to bounce back and forth causing a rattling or clunking sound. Merc says it hurts nothing and I agree as those gears are high tensile hardened, but the noise is annoying. When I put on my lesser pitched SS prop I don't hear it, or if running the big one just speed up slightly till it quits. The biggest annoyance is driving on the trailer so I just do a lot of shifting F-N to get lined up, control the boat speed, and minimize the rattle.
Not much else man.
Mark
