61 fires up then dies,seems to be good spark and gettin fuel

If its getting fuel, spark, and has good compression there's only two things left. Either no or very little air or a blocked exhaust.

those chrysler engines have camshaft positioning sensors and crankshaft pos. sensors that will make it not fire. but u first need to see if its not getting fuel or fire. its not gettin one or the other

Have you checked cam timing?If it has jumped a tooth or two it will not start.

You need to check it is mechanicaly sound, a compression test will give you a good idea, anything under 110 psi and you have a problem with either piston/ring wear, or it has seized.

Is the spark srong enough( BLUE)check timing cps post back

are you gettin fuel ? are you getting spark ? if so is it bright blue it should be if its orange is bad
check and replace fuel filter if all that is good check and replace crankshaft postion sensor and or cam shaft postion sensor as they tell the ecu when to fire the spark and to what cylinder


lmk if it helps please give me good feedback

Alternator issue more than likely. I believe the regulator is built in the alternator and the brushes are bad. Brush cnagnge should be considered first. It would only be an $8? fix I believe. It is easy to change brushes if you know what your doing or have a teacher.

if it starts then its gettin fuel,but it might not be gettin enough.or it might be gettin too much. after it starts and dies remove spark plug, if its wet then the saw is flooding out, try cleaning the plug and airfilter,u can also add some seafoam to the gas,it will help clean any dirt out of carb. if that dont help check the carbs diaphram

Step #1 in any automobile diagnosis is "Isolate the system"
Switching fuel tanks may have seemed like a good idea, but it did not definitively determine whether the the fuel is getting to the fuel rails, so you are no closer to eliminating the fuel devery system than you were when the engine died.
If it does it again, you should do the easiest things first.
Pull a spark plug wire and check to see that you have good spark reaching the spark plugs. Good spark will eliminate the entire spark control system.
Only if you have good spark should you suspect a "part-time " fuel system problem. The Fuel delivery system can be eliminated if actual fuel pressure is checked at the fuel rail. (although you could still have injectors not firing for one reason or another)
You are losing one of these systems. (spark or fuel) only once you have determined which one, can you continue diagnosis to pinpiont the failure.

it's not that your not gettin gas it's that the gas is not getting thru the carbs to the engine. your bike will probably start w/choke on and then die, your jets are clogged and happens to most bikes that are stored w/gas in the carbs.,,,clean them if you know how or take it to a trusted mech...good luck to you...Tim