78 Liquifire troubles

buck43 · Post by **buck43** » Thu Sep 29, 2005 10:19 pm

I have 78 440 Liquifire with only one cylinder firing I have spark very good spark it let me know when I got to close. I removed plugsdidn see any holes in pistons compression seem ok dont have tester. Any ideas? Thanks Shannon.

JDFanPa · Post by **JDFanPa** » Fri Sep 30, 2005 12:38 am

If you got shocked by the wire it might not be firing the plug. Is the dead cylinder flooding out or could there be a fuel supply problem with that carb? You really need to check comp with a tester 75lbs or so might feel like a lot with the finger in the plug hole trick but the sled wont run on it. Will try and help you more but we need some more info first.

harleysportster · Post by **harleysportster** » Fri Sep 30, 2005 7:01 am

Shannon,
You should rent or buy a compression tester. If you have at least 75 psi in the cylinder it should fire. Since the liquifire has 2 carbs , I would suspect the carb needs a good cleaning. check out this link:
http://70.85.240.179/4013/126/upload/p754126.jpg
Check and clean all the jets. Also check the adjustment on the choke cable. There should be about 1/8 inch slack in the cable at each carb ajuster with the dash level in the down or off position. Remove the air box and try squirting a fine mist of premix from household spray bottle, in the carb and try and start it. If the crank seals are original, they could be a problem also allowing a leak during the transfer of fuel.

buck43 · Post by **buck43** » Fri Sep 30, 2005 8:10 pm

Ive checked carbs they are in fantastic condition jets look like new I was surprised to see them in such good condition the sled had set for over a year before I got it. Ill get a compresion tester what would should I get. Thanks JDfan and Harley I got your email. Shannon. PS plug was wet.

harleysportster · Post by **harleysportster** » Fri Sep 30, 2005 9:55 pm

Shannon,
If you are going to buy a compression tester, buy one that threads into the spark plug hole. You can get them at any auto supply store or Sears.
You may have a weak spark plug. Try switching between cylinders. I had a similiar condition last year. It turned out that the external coil was weak. The spark would show up with the plug laying on the head, but as soon as you thread it into the head, it would foul the plug under compression. Another thing to consider is the present climate. The jets may be to rich for the warm climate to run.

JDFanPa · Post by **JDFanPa** » Sat Oct 01, 2005 1:33 am

Id question the firing on 75lbs specialy if the other cylinder is low also but lets not debate that. Harley has a good idea about the coil though how about swapping the 2 wires coming from the cdi from side to side and the plug wires switch them also. This would be like removing both coils and switching them without the hassle and see what happens may pinpoint or eliminate an ignition problem.

buck43 · Post by **buck43** » Tue Oct 04, 2005 8:32 pm

I found problem 10lbs. on PTO side removed head found piston down to rings . Ive talked to Harley and will change crank seals also. Ill let you all know how it goes Thanks Shannon

JDFanPa · Post by **JDFanPa** » Wed Oct 05, 2005 1:21 am

glad you found it to bad its a big problem.........if you find you need anything head,cylinder,pistons crank etc for this drop me an email have 1 of these motors thats being parted out was a running unit but couldnt sell complete so am parting

buck43 · Post by **buck43** » Wed Oct 05, 2005 11:15 pm

what do you want for the whole motor ? I have 3 Liquifires could always use spare.

JDFanPa · Post by **JDFanPa** » Thu Oct 06, 2005 12:05 am

email me directly at jesse_jameswannabe@yahoo.com and I will send you some photos Its been semi parted sold the cdi,stator,trigger and the intake and reed setupit is still complete basically in longblock I guess form