Neptune AA1 Flywheel

[hidditt]

I am attempting to pull the flywheel on a little Neptune AA!. There are three holes on the flywheel that I assume are for the the flywheel puller machine screws. The holes have no threads! A 1/4-20 machine screw passes cleanly through the holes. The flywheel isn’t very thick – maybe 3/16"

I think I need to drill the holes out and tap to the next size up – say 5/16-18. I am concerned about the lack of material for the threads, and all the filings that will fall onto the mag plate.

Am I missing something here? Did the last owner rip the threads out of the flywheel attempting to get the flywheel off? Or, is there some secret puller system that I am not aware of? I use the OMC flywheel puller tool but never worked on anything but OMC motors in the past. .

PS. Nice little project motor – has about 65 psi compression but no spark.

[Tubs]

Sent you a PM.
Check your messages
at the top of this page.

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

[hidditt]

Got the flywheel off. Used the suggested tap the crankshaft method suggested in private message. Used the brass nut instead of a custom nut/bolt tool.

Worked great! Magneto parts are all there. I will start learning how to test the condenser, coil and points. So far, all I have is a simple digital multimeter. The resistance on the points seemed pretty high at 0.8 ohms after cleaning with a piece of card stock. Must be something wrong in my setting.

I took the lower unit off. Now I am struggling to get it back together. There are a couple of washer/bushing bits that need to be aligned somehow. Maybe need to dis-assemble the gear housing? Found a nice little "Condensed Service Data" manual on the web. Shows exploded views of the assemblies. Any suggestions from the Mighty Mite experts would be appreciated.

[hidditt]

Got the lower unit back together. Took off the lower unit inspection plate and found a very tight fitting washer above the drive gear. Just took a couple of minutes.Coxed the washer back onto the drive shaft and then put the gear back on, then tightened up the screws all around. Wow. What a simple system! Still some grease in the lower unit. Should I disassemble the lower unit and clean of the old grease, then replace with Lubriplate? Or should I just add some more grease through the filler hole?

FYI. The water pump appears to be all metal. I have never seen that design before.

[b-morrison]

Great little motor, reliable backup and light. You’ve gone this far, don’t stop now. When you clean out the old grease you will be able to evaluate what you can now see. Also the new grease will allow freer movement. ..

[ray-schaber]

Great little motors. The only bad point is the steel gas tank. E85 will rust it quickly.
Ray

[hidditt]

I ordered a replacement coil and should have it by Easter. Hopefully will have spark again before spring. Carb cleaning next!

PS. In Canada, we are lucky enough to have Shell Gold (Super) that is always ethanol free. I run it in all my outboards, snowmobiles, chainsaws, etc. Never a problem with fuel!

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