I NEED HELP WITH A JD300, PLEASE!!!!!

JD3001975 · Post by **JD3001975** » Tue Jan 27, 2009 7:01 pm

I have a 1975 Johndeere JD300 with a 340cc F/C CCW Motor. I just bought a new external coil for this
sled, because she lost spark last winter on the recoil starter side. I put the new coil on, and STILL NO
SPARK!!!! Does anyone have any sudgestions???? Please help, would like to ride it before winter leaves.

Attachments:

Picture_101.jpg (1.29 MB)

tmartin · Post by **tmartin** » Tue Jan 27, 2009 7:08 pm

Check plugs, plug wire ends, and if it has points check those. If it has points they will be under the flywheel. Pull the flywheel and clean them with a points file or emery and try it. Its more than likely corroded points but check the plugs and plug ends first or switch the inputs on the coils and that will tell you if your points are bad. The side that doesnt have spark should get it if you cross the inputs to the coils. But make sure you put it back if you decide to test it this way.

JD3001975 · Post by **JD3001975** » Tue Jan 27, 2009 7:31 pm

Thanks for the quick response guys!!! Yes it does have a 340cc CCW motor. This motor does have
points??

JD3001975 · Post by **JD3001975** » Thu Jan 29, 2009 7:38 pm

Thanks guys, I tried the points , Cleaned them up, put it back together and now it ie sparking on the
recoil side, but now not on the clutch side. What is going on with this thing??? I even tried ajusting
both sets of points. Nice bright blue spark on the recoil side. Please help guys!!

400brian · Post by **400brian** » Thu Jan 29, 2009 7:46 pm

Swap the leads coming from the points to the external coils.

If the dead plug swaps sides, the problem is under the flywheel.
If not, the problem is right in front of you: coil, wire, or plug.

Rodimus Prime · Post by **Rodimus Prime** » Thu Jan 29, 2009 11:05 pm

have to ask is the build date 1975 on tunnel? if so that would make this a 76 sled. Which would actually be a 340/22 reedvalve engine.

either way its the points you cleaned them but you may have left fluff or something between the points on one side reclean the points with ladies nailfile (some dont go all the way to end just cut it off) regap and it should work.

JD3001975 · Post by **JD3001975** » Thu Jan 29, 2009 11:46 pm

I believe i read "79" on the tunnel.

JD3001975 · Post by **JD3001975** » Thu Jan 29, 2009 11:56 pm

The guy that sold me the johndeere told me the JD300 was a 1975 model. Actually, i traded my 1985
v-max 540 for this. The v-max needed a rebuild anyways.

JD3001975 · Post by **JD3001975** » Fri Jan 30, 2009 6:49 pm

One other question guys, When ajusting points, Do i adjust them while they are open, or closed??
I am getting so bummed out with this thing... I WANT TO RIDE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

JDT · Post by **JDT** » Fri Jan 30, 2009 9:38 pm

Opened at the widest point.

Then rotate 180 degress and set the second set.

400brian · Post by **400brian** » Fri Jan 30, 2009 9:43 pm

What version of Bob are we up to now? Bob 2.0, 3.0, I can't keep track. :lol22:

JDT · Post by **JDT** » Fri Jan 30, 2009 9:46 pm

JD3001975 · Post by **JD3001975** » Sat Jan 31, 2009 12:11 pm

Ok, i know to open to widest point, now should i use a matchbook to do this with adjustment with?

JD3001975 · Post by **JD3001975** » Sat Jan 31, 2009 12:15 pm

I also need a good shroud that goes over the motor for this sled if anyone has one here...

harleysportster · Post by **harleysportster** » Sat Jan 31, 2009 12:19 pm

JD3001975 wrote:Ok, i know to open to widest point, now should i use a matchbook to do this with adjustment with?

You need to use a 0.014 feeler gauge to set the points.