1964 75hp submerged, too much fuel draining out when tilted

[Evinrude Boater]

The motor was submerged for several hours. The magneto, distributor, starter, generator and carburetor were totally disassembled, dried out and reassembled. The heads were pulled and the cylinders dried out, oiled and reassembled. It fired up immediately and idled poorly on fast idle. Warmed it up then shut it down to adjust the points. Took it to the lake to give it a good run. It started immediatley and ran poorly as before. Tried to idle it down to shift gears but it stalled. It fired a few times when trying to restart it then no spark at all. Checked the points again and them seemed to be fine. Pulled the coil and found small cracks in the plastic at the corners of the metal blocks that stick out both sides. I'm sure water entered the casing and it's probably fried but is there a method to test it before hunting for another one?

 

[Daviet]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

There is a coil tester, may have to take the coil to a repair shop to have it bench tested.

 

[1946Zephyr]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

At least you did the right thing, by getting it running again. I would do like Daviet said. Good luck and happy boating.

 

[tashasdaddy]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

well, if you did not use a new head gasket, that could do it.

 

[Evinrude Boater]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

No, I didn't use new head gaskets but I don't see the connection with the no-spark condition. I put spark testers on all four plugs after it failed to restart and there's no indication of a spark now.

 

[Chris1956]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

If the coil has cracks, it must be replaced. I do not think the cracks have anything to do with the submerging. Replace the condenser at the same time, for good measure.

 

[Evinrude Boater]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

Tried it today and it fired up immediately but only ran for a few seconds and died. Wouldn't fire after that. Something seems to be breaking down when running; coil? condenser? I get about 6.3 ohms between either wire and the coil output contact. Does that prove anything? How can the condenser be tested?

 

[Chris1956]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

Condensers can be tested after a fashion. Use a ohmmeter across the case and the lead. This will charge it. Now quickly switch the leads and set the meter to volts DC. You should see a momentary spike on the meter if the condenser is good.

If I were you I would put a timing light on the plug leads and spin the distributor by hand to see if the spark is consistant. If you have no spark, drop the cap and test the coil contact with the timing light, to rule out a bad rotor.

 

[R.Johnson]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

Are we working with a battery ign. with a distributor, or a magneto?

 

[Daviet]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

Just thinking, a 1964 is a mag. Maybe I am wrong.

 

[Evinrude Boater]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

It is magneto ignition. I have spark to the plugs and it fires up but doesn't continue to run. After the initial start it doesn't want to start again then it seems it doesn't even fire after trying for a while. It has 80 psi all around. Tashasdaddy made a comment about the head gaskets so I took the heads off again and they look to be in good condition. I over torque a few pounds to compensate for the crushed gaskets. It ran good with used head gaskets prior to the submersion.
Not sure where to look next.

 

[tashasdaddy]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

you cannot reuse gaskets. sorry. here is correct gasket. sierra 18-2969. should be able to get them from iboats.

 

[Evinrude Boater]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

you cannot reuse gaskets.

But, but, but....it worked well before it went upside down. So, you think this is the cause of my starting and running dilema and I've been chasing ignition?
I don't see that number on iboats. I see 18-2959, for OMC #306048. Is that the right one?

 

[Chris1956]

Re: 1964 75hp submerged

Re: 1964 75hp submerged

Don't get off track. Check compression. If they are 90PSI+ and even, they are fine. Work on getting her running.

 

[Evinrude Boater]

Re: 1964 75hp submerged, now running rich

Re: 1964 75hp submerged, now running rich

I checked compression before removing the heads. All are 80 psi. I cleaned the mating surfaces and gaskets and reused them tightening to 20 ft/lbs instead of 15. It started and ran on fast idle but had to open the butterfly a bit to smooth it out. It's spitting fuel out the exhaust and after it quit I tipped the engine up and all kinds of fuel drained out, more than normal. The plugs are all wet with fuel. It seems to be running excessively rich. I think I need to take the carb apart again. I think I bent the float adjustment when I was cleaning the carb. I was too eager and didn't take the time to check it. In any case, fuel is going through it like a running garden hose so something is amiss.

 

[Evinrude Boater]

Re: 1964 75hp submerged, now running rich

Re: 1964 75hp submerged, now running rich

Replaced the points and condenser and it fired right up. Ran it on the lake at various speeds then adjusted the slow speed screws. I've adjusted them a few times using the Joe Reeves instructions and it still doesn't jump out of the hole like it did before. Also, when I tilt the motor up it drains quite a bit of unburned fuel mixed with water (grey cloudy colour) more than usual. It drips out the front drain hole in front of the water pump. The plugs are dry and tan so it seems to be burning everything. I just can't figure out where all this unburned fuel is coming from. Could it accumulate in the leg if a drain hole is plugged and only drains when tilted? I keep thinking about the float adjustment that I might have bent when cleaning the carb. Could it be allowing fuel to drain when tilted and maybe that's why it doesn't respond better to WOT?

 

[Chris1956]

Re: 1964 75hp submerged, too much fuel draining out when tilted

My '58 50HP V4 had a drain from the intake manifold to the water jacket. Any liquid fuel that built up in the crancase would get pumped out the exhaust. I do not know if your motor has this feature, however, the symptoms you describe fit.

I would recheck the carb float height and condition of the inlet needle to make sure the float is set correctly, and the needle seals well.

 

[aguitarestv]

Re: 1964 75hp submerged, too much fuel draining out when tilted

well you know if the needle and seat are working proberelly, sometimes is sticky or stuck shut, it can dump fuel atleast on some of the older carbs, had this problem with a 9.9 hp johnson

 

[Evinrude Boater]

Re: 1964 75hp submerged, too much fuel draining out when tilted

My '58 50HP V4 had a drain from the intake manifold to the water jacket. Any liquid fuel that built up in the crancase would get pumped out the exhaust.

This motor is the same. Fuel vapors that condense and accumualte in the intake are drained down the exhaust tube. I can run this girl hard and shut it down and I still have all this goo running out the leg when tilting it. I could accept it if I was idling it a lot but not the way I'm operating it. The carb is coming apart this afternoon.