Turd Polishing

[fishinwrench]

1 hour ago, MrGiggles said:

Im going to run the injectors down to Sho-me speed and have them cleaned and flow tested

Before you spend a dime on anything I would recommend running the serial # and verify what parts are still available.

[MrGiggles]

1 hour ago, fishinwrench said:

Before you spend a dime on anything I would recommend running the serial # and verify what parts are still available.

Already got a head gasket, powerhead gaskets, thermostat, and controls on the way.

I haven't found a lot of NLA parts, but the gaskets are high.

Wonder if it's only the Yamaha made 4S Mercs that don't have any parts available. This is a baby Verado, without the supercharger.

[MrGiggles]

Injectors tested fine. At least I know they're all good now, but I would've liked to have a definite answer to the failure.

Just waiting on the head gasket and the controls now.

[MrGiggles]

While going through and checking all of the valve clearances, I found that both intakes on #4 are way too tight, like zero. Even swapping a shim from the exhaust doesn't bring them into spec.

Measuring the stem heights, #4 intakes are both about .015 higher than the rest. That is another conundrum, seems like the detonation that was happening in #4 also pushed the valves into the head quite a bit. 

I need to order new rod bolts anyway, guess I will get some .015 thinner shims and see how the clearance comes out. At least they aren't real expensive.

[MrGiggles]

Got the long block assembled last night. Had a lot of trouble with ring compressors, finally ended up trying a tapered Wiseco sleeve that worked like a charm.

Just need to clean the cams up and get everything timed, then the powerhead will go back on. Hopefully will be ready to see if it pops tomorrow.

I swapped in .015 thinner valve shims on the #4 intakes and the clearance came out perfect, so that's taken care of.

[MrGiggles]

 

That's that. I was going to try and hit the water tonight, but I don't have the Merc cable adapters for the controls. 

It is pumping water but there is some sort of blockage in the telltale circuit. Whizzes like crazy out of the water pressure hose.

I also goofed and forgot to install the retaining ring on the upper crank seal. Not a big deal, just need to pull the flywheel again.

[fishinwrench]

Your water pump housing is above the water line.    The pump can't prime like that.  

It's better to use muffs, so it forces water into the pump housing...... otherwise you'll burn the impeller up.  

[MrGiggles]

8 hours ago, fishinwrench said:

Your water pump housing is above the water line.    The pump can't prime like that.  

It's better to use muffs, so it forces water into the pump housing...... otherwise you'll burn the impeller up.  

I tried muffs first with the same result. Steady stream out of the water pressure hose but a few drips out of the tell tale.

This motor also has a flush port, I'm not sure if you're able to run the motor with it, but when I tried using that, it acted like there was a blockage and there was no water exiting the lower unit. 

The manual shows that water first goes around the exhaust manifold, which is where the supply for the FSM is tapped in, the telltale is tapped into the outlet from the FSM. Mud daubers may have gotten into that FSM while it was off. There is also a screen on the inlet fitting that I should check.

[fishinwrench]

It may not piss until the thermostat opens up.   Not sure on that model.   

[MrGiggles]

Mud bees had clogged the tell tale hose on either side of the tee, and then somehow made it  through an 18" bendy hose and managed to also plug the inlet on the FSM. Got them all cleared out and it's working well now.

Not much else to do until I get the cable adapters.