Whoa... You're either on compression OR exhaust stroke on #1. Not necessarily on 3 and/or 5. Without looking, certainly possible you have open intake valves on those cylinders, so your test might be wrong
Edit: and yes, that's the timing mark on the composite cover
Watch case tube diameter.
That's what I was thinking. But I think I'm looking at a diameter of 2-2.5mm
Saw some of these sets, they're too small. Looks like I need #47-39.
Good thoughts, I'll keep looking
Pin gauge looks to be the closest, though I can only find them in a big expensive set (and mostly sae). Drill bits aren't easily available in sub mm sizes I need, same with welding tools. Had already searched for hole gauge/wire gauge. I'm wondering how close I can get using various combos of...
Yes, I agree with that. Nothing to do with the point I was trying to make though. Anyway, not sure how long op ran it without water on. I'd be interested to know that, and what the impeller looks like if it gets changed.
Well, the newer shafts don't have a groove for the o ring, and I had it get caught in that seal as well before. Guess that the o ring is to help seal that shaft cavity from water since the seal is oriented "wrong"
That sucks. Did you check the pressure at speed and when it died? My Edelbrock had flooding problems at 7.5 psi (and ran fine at 2-2.5 psi). Mechanical or electric pump?
So you can see that damaged o ring on the gear shaft, looks like it got caught in that lower seal (which is why Merc deleted it). That seal keeps water from the upper drive shaft. Good chance that the shaft is rusted/damaged. If so, you'll need to install a speedi sleeve on it if it's grooved...
