Snowmobile Fanatics banner

1 - 5 of 5 Posts

·
Registered
Joined
·
4,322 Posts
Discussion Starter #1
do the older 600's have any kind of valves in the motor mine is an 83 indy 600 and after replacing the coil it worked for like 20 minutes then the cylindar started doing the same crap. so i pulled the plug boot off and put a new spark plug in it (left the other one in the cylinder) and started it TONS of bright blue spark. so that brings me to the carb. pulled the carb off took it all apart brought it into the house and boiled the damn thing incase there was something stuck deep down inside it somewhere. let it dry overnight put it back together put it back on and still same crap. wont kick in and start to fire on that cylinder tillclose to 5000 rpm. so i pulled a carb from my other sled that i know works fine. put it on still nothing till 5grand. im stumped have around 135# of compression on each cylinder. it will kick in at low RPM when i hold the choke open a hair. any ideas before i get mad and junk this thing?? thanks in advance

bobby

My wife said its me or my sleds... Im sure gonna miss her
 

·
Registered
Joined
·
1,172 Posts
Bobby The fact that the cylinder starts to fire if you hold the choke on means that you are probably not getting enough fuel from that carb. Since the problem clears up after 5000 rpm the lean condition is probably in the idle and low speed system of that carb. the fuel is supplied at this system through the two small holes in the bottom of the bore of the carb. One is directly under the forward lip of the slide and the other is the hole drilled on an angle closer toward the motor.the fuel is supplied through the pilot jet from the float bowl. the air for this system comes through an air passage from the front of the carb, the upper of the three holes you see. the amount of air is adjusted by the air screw on the side of the carb. Make sure this screw is the same amount of turns out as the other carbs, usually one turn will do. next make sure the pilot jet and the two small fuel passages are not plugged or restricted in any way. after this the only other thing that comes to mind is to check your slides to be sure that that carbs slide is not lagging behind. When the cables a adjusted correctly all slides lift at exactly the same time. good luck hope this helps.
 

·
Registered
Joined
·
4,322 Posts
Discussion Starter #3
all three slides move exactly at the same time. now i have tried 2 different carbs on this thing to no avail and as for adjuting all three carbs the same you need to adjust each carb for each cylinder since each cylinder will run a tad different.
bobby

My wife said its me or my sleds... Im sure gonna miss her
 

·
Registered
Joined
·
4,322 Posts
Discussion Starter #4
everything is clean and straight in the motor no wear marks on the pistons or cylindersso i put new gaskets on it but i cant fire it up tonight

My wife said its me or my sleds... Im sure gonna miss her
 

·
Registered
Joined
·
4,322 Posts
Discussion Starter #5
ok got it fired up still doing it. so i replaced the plug boots guess what it runs fine now i replaced them once before but i guess i had a bad one i guess. thanks for all the help

bobby

My wife said its me or my sleds... Im sure gonna miss her
 
1 - 5 of 5 Posts
Top