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Quick question- I was looking at my exhaust side as I was worried about some water intrusion. I noticed the exhaust baffle plate has a slight warp to it. I found one on ebay, and have asked if they can measure it on a straight edge, but what are options? I am reading a lot of threads on these...

Im gonna go back through the carbs this winter and use the neoprene tips. I keep seeing fuel in the throats of the carbs and my floats and tangs are both in spec

I’ll post a picture tomorrow when I get out to the shop. I have some of the older ones, but my new needles don’t have the neoprene!

That is one of the many confusing things about these older motors. I have most of my original needle seats and needles, so i was able to compare. The issue i was having was in the threads of where the needle seat screwed. Perhaps from 30+ years of removing the copper washers with picks and...

Yes! I am familiar with all the parts. I guess I wasn't clear in my listing of what was happening. It was more tech philosophy. On my motor, there is no way to keep it running in idle if it is exactly set up to the spec in the Mercury manual. This was the same before the rebuild and after the...

-Had an interesting thing with bottom carb. I took off the bowl, thinking something with the float had to be allowing some fuel in the throat. I couldn't find anything. I went ahead and took it apart. When i removed the needle seat, the crush washer was crushed at an angle. I tried reinserting a...

Man!! I remember when I was prepping the boat for the season and found the dead C3. I told my wife that I was gonna try to fix the engine and there was a good chance it wasn’t gonna work… I have never worked on an engine before, outside of simple rebuild of carbs and such. Opening up the block...

Not sure if i should keep this in this thread, or start a new one. Im reassembling motor. Right now im working on the throttle linkage. I have all the parts and have assembled them in the order that is shown in the parts page. I cant find any torque specs for this section. The mounting...

Quick update. I have crankshaft closed up. Exhaust, waterjacket, transfer ports, head all on with mostly new bolts, all torqued to spec. Trigger is good, but one side of stator was reading a really high resistance, so replaced that. Once I get new one I’ll test CDI packs and ignition coils. Then...

I got the screw to torque. Have the crankshaft set and all the pistons in. I will start attaching them to the crankshaft next week

I agree. Trying to figure out what is going on

OK. finally back from work and back on the motor. I was having an issue with getting the reed assembly bearing screw and nut tight enough. I assumed i had stripped the screw so ordered replacements. The screw is "N" in the diagram. This corresponds to part number 45775, and the nut is 45774...

I texted the machinist yesterday morning after my findings, and ended up taking the block to his shop. We were talking about boring all the cylinders, and whether to bore them all to .03, or take the standards to .015, and the 3 .015 to 30. We took all the pistons out and weighed them on the...

yes. spec is .003. Im going down the rabbit hole because the machinist didn't provide this information and i wasn't comfortable re-assembling engine without more data.

OK. I think i got all of this somewhat straight. Mercury wording is a little convoluted and confusing, but the biggest measurement is 90* to wrist pin. All of my OEM are coming in a bit smaller than those numbers. My clearances are pretty big, around 6-7 thousands on the 3 cylinders im looking...

I am about to finish installed new pistons, but I’m trying to make sure all my measurements are correct. This pistons measurement is confusing to me. It seems that it’s asking for 2 measurements but it seems they would clarify that. I don’t know how one measurement, at wrist pin, could both be...

Spent the last day learning micrometeres and bore dials. The ones i got don't suck, but they aren't machine shop level. Here is what i have on the 3 im working on.: lost compression in C1 and C6. Was taken to machine shop Cylinders were not bored or sleeved. Machine shop performed a light hone...

I did split rod bearings, cages, and caps, by piston. I am getting some real micrometers, and a decent dial bore guage. I'm going to go through the cylinders and get some numbers. This is too much work to just slap it together(Ive rebuilt everything but lower unit) and I want to make sure it is...

No! I appreciate the time and detail. This is all new to me. It is strange that it doesn’t talk about ring gap in the manual, but I’m going back through and measuring that now. I had about .006 at 1” and bottom in c2(standard). That was the one I broke the ring on, but again, think it was from...

Wow! Thanks for the details. This is all such an education. I wish I had that communication and detail from the machine shop. Honestly, I thought I wasn’t going to be able to get anyone to do the work and was gonna be sitting on a broken block. That said, I have very little detail on what was...