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Yes, ground the wire connected to the thermo switch and the buzzer should go off. If not check the wiring and buzzer are okey. To check the switch you have to heat it up.

The regular thermo switch on/off I put it in a can with water and put on a stove and a thermometer. With a VOM connected to it and check resistance you can see when it closes. It is not an easy check but it will work, at least for me.

I prefer a horn or light and I always check the water flow when starting and when I cruising. Always check when cruising is a bit troublesome but it is worth it!!!

Ohoo, did he had bellow! I will contact him and ask if he have some more. I have a gear case with a bad bellow. Thanks borutskis!!!

Are you loosing spark on all five cylinders?

Franz Marine will have seals for the LU. All seals and o-ring are available except the seal for the shift shaft at companies that sells bearings, seals, power train stuff and other machine related details here in Sweden. I suppose they are in the US too.

Yes that bellow act as a seal for the gear case. This was a bad design from the Force engineers and they changed it to a regular seal later. They are N/A as you state, maybe Franz Marine still provide a replacement as he did in the past. The replacement is expensive and a R/R stuff. You can try...

You can troubleshoot these ignition system with a VOM and a DVA adapter. If you are handy you can build your own DVA adapter it is very easy. It contains a resistor, a electrolytic capacitor and a diod. Google DVA adapter and you get the schematic for it. Go to Outboardignitiondotcom and you...

Yes exactly what Topgun3690 says, use those cheap filter such as Fram G2 and other brands. BTW Fram is a good brand in my opinion, they make good oil filters for cars and these fuel filter are very good stuff.

I am a bit puzzled, have never seen that typ of cover but it looks like it is broken. I can not determind that. Maybe jerryjerry or pnwboat will chime in.

Change the fuel pump diaphragm and put a clear cheap inline fuel filter between the fuel pump and the carbs. This is cheap stuff and useful. With a clear filter you can see if fuel is pumping to the carbs the troubleshoot from there.

Looks like that is a part of the cover and it has broke from the rest of the cover. The cover has a grove for an o-ring and the two seals #18 and 19 are seated in the cover too.

Part number 18 and 19 are seals. 18 seal for drive shaft to water pump housing and 19 seal for drive shaft to gear housing.

Remember if you are searching for parts that Brunswick (Mercury) started to put more and more Mercury parts to the Force from 1993-94 and up. Major of the parts was the ignition system and gear cases.

I use a larger screw driver or a small crowbar and wedge it between the flywheel teeth and the starter gear teeth. It has always worked out to loosen the flywheel nut.

From earlier in the thread you mention you have change both ignition coils. That´s right? From my experience ignition coils for OMC engines from 50-70.es suffers from dry out and cracks. Other brands like Merc and Chrysler did not have that problem. I have not have these issue with these brands...

The major different you have between running on muff and running in water is when in water you have the water back pressure. First check to run in water without the engine top cover on. Maybe you have an exhaust leak, check for leaks around the exhaust cover plate and the exhaust/water rubber...

Sounds like it is running on one cylinder. Check for spark again with a timing light when running. I do not trust the cheaper inline spark tester, that is why I suggest you to use a timing light. I have use these cheap inline tester and got spark (it flashes) and when I check with a spark tester...

Check the ignition system once more, it sound like an ignition issue. Check for spark with a spark tester or use a steel rod to connect in the HT wire rubber boot and hold it about 5/16 or more from good ground. Pull the recoil starter and you should see a spark jumping that gap. Replace points...

Of course racerone you are right, my brain must have had some miss match when I typed it down !!!!!!!!! Sorry.