Magneto Coil Removal & Check - need assistance

[PurpleDragon]

Re: Magneto Coil Removal & Check - need assistance

Well, I guess we have good news again.<br /><br />Both Spark plug wires are reading at 7128 ohms from plug boot to ground.<br /><br />Open point gaps are both reading .7 ohms to ground. - and are both set to .020 according to my gauge.<br /><br />Top cylinder - after cleaning the points (again) is now sparking! YAAAY. Bottom cylinder - no dice, yet - but I'll work on it tomorrow morning when it's light outside again (and up in the high 70's I might add).<br /><br />Rex

 

[petryshyn]

Re: Magneto Coil Removal & Check - need assistance

>clean points by allowing them to close on a folded piece of crokus cloth(pull out and repeat several times)make the last pull with a clean piece of paper!!! any residue left will add resistance.<br />Good luck!!<br /><br />spray the cylinders with a good shot of WD-40

 

[norman158]

Re: Magneto Coil Removal & Check - need assistance

Rex as long as that motor has sat with out running i wouldn't be too worried about the low compression. when you get it running it will come up. compression tests should be done with the motor warm from running not the weather

 

[PurpleDragon]

Re: Magneto Coil Removal & Check - need assistance

WOOO HOOOOO<br /><br />Guess what????!!!!<br /><br />The baby run!!!!!<br /><br />Got the other contact points cleaned up REAL nice, then the lower cylinder plug started sparking! Plugged it back in to the cylinder, pulled the rope, and "Cough" - it "wanted" to start. So I filled up the trashcan underneath it with water, hooked up the gasline, and pulled the rope.<br /><br />Cough.... Sputter.... Vrooooommmmmmm<br /><br />I ran it for a good 3-4 minutes. Water was pumping well, it was coming out the water outlet. Fuel "seemed" to be pumping. I'll know better later this afternoon.<br /><br />The only bad news right now is that I need to keep a few shear-pins (keys) on hand for emergencies. I tried cranking her again, and wouldn't start - so opened up the flywheel again. And just as you had predicted, the shear-pin had snapped. I'll have to make sure of the torque on that top-nut.<br /><br />Rex (adrenaline is still pumping!)

 

[Backlash]

Re: Magneto Coil Removal & Check - need assistance

Good deal Rex! Persistence pays off. No greater reward than to take a seemingly useless hunk of metal and get her going again. <br />Backlash

 

[PurpleDragon]

Re: Magneto Coil Removal & Check - need assistance

Guys - Thanks to you ALL for your assistance on this.<br /><br />5 spare woodruff keys, and 80 cents poorer are well worth the investment They will stay in my boat tool-box.<br /><br />The other tools I bought are a small price to pay for knowing that on a boat & motor that were given to me - and hadn't been run for close o 30 years - that I was able to get it running again.<br /><br />Ran the motor for a good 30 minutes straight. I'd say the fuel & water pumps are working at that rate.<br /><br />Compression is still down at 60 psi on both cylinders (after warming the engine) - but we'll keep an eye on that for a while.<br /><br />It runs like a typical, old, 2-stroke motor. A little smoky, a little oil on the water. But, I'm happy. It feels strong.<br /><br />Next, I'll be changing out the lower unit's gear oil again. I changed it 2 weeks ago, but would really feel better knowing that all the old gunk is out of there, after having the prop rotate in gear for a minute or two. (It was in a trash-can full of water at the time).<br /><br />Once again... Yeeee Ha!<br /><br />Rex S.

 

[norman158]

Re: Magneto Coil Removal & Check - need assistance

GOOD FOR YOU dont forget to change the impeller if you haven't done that all ready its long past due

 

[petryshyn]

Re: Magneto Coil Removal & Check - need assistance

Rex<br />be sure to clean up any galling that occured from that sheared key, both on the crank and flywleel. Carefully file the high spots away.<br /><br />Good luck man ....way to go!!

 

[Rex]

Re: Magneto Coil Removal & Check - need assistance

Glad to hear that everything work out great.<br />Just check the torque as the other members <br />said.<br />The taper lock should hold it.<br />The key is just to set the flywheel right.<br />GOOD LUCK.<br />REX A.