thanks I believe engine is correct for model thought maybe it was switched out at one time have no history of sled

I have a 1973 jd600 but this engine serial # has me courious. This is what the tag says model KEC-440 nothing after 440 and the # is 5501743.

i hear ya JDT just courious though what spark plug is the best for this engine? Have ngk in it now without looking can't remember which ones.

what spark plug would produce the best hottest spark if the system is weak?

thought of that DLDEERE thats not it will try a few things and post back tommorow

thanks jdt

thanks for all the info will try again tommorow. What would be the best spark plug if the ignition is weak? Also how to get fuel out of the crankcase suck it out or blow it out? Don't want to give up if since there are good signs of engine being sound. thanks any other ideas let me know

This maybe my last update on my jd 600. Tried eveything I could think of to get it to fire compression good spark ok plugs have some fuel on them after trying to start. What the heck sprayed starting fluid in spark plug holes did here a little rumble. It ran for 2 minutes or so and sounded so great ...

nice sled by the way anyone read my thread jd600 i just updated it and need some advice?

:wall: First had it running last weekend for 3 minutes used starting fluid for it to fire. Now anyone willing to help I appreciate it. Here's what i've done so far cleaned fuel tank and filter. Replaced all gas lines and had carb rebuilt walbro 32a. New plugs ngk gap .020 have good spark not a mecha...

thanks for your help maybe i'll dig into this sled a little more and look you up for some parts

Not sure of the date or where to look for it. No pics yet once its in my garage I will be posting some.

We replaced all the fuel line,filter, and cleaned the tank compression was checked both were equal does 120 sound right by the way its a plastic tank is that correct or was it steel orginally

my brother bought it at a farm garage sale it has 1374 miles. He had the carb rebuilt and we fired it up last weekend. He wants to give it to me but i'm not sure i want. It's a clean sled and was running ok needs some tuning wont idle. I never had a sled or worked on one before so the question is ca...

thanks for the title info did you see the info on my sled?