Back firing issue

[Nerkabill]

Model# 1075412RD
75hp 3cyl 1996
Changed plugs, cleaned carbs, tested magnets in fly wheel and ignition module and coils.
Still back fires under load

 

[faztbullet]

Does it backfire from exhaust in neutral also or only in gear underway? Also are you sure it backfire or spitback thru carbs?

 

[Nerkabill]

Does it backfire from exhaust in neutral also or only in gear underway? Also are you sure it backfire or spitback thru carbs?

It is back firing all the time weather in neutral or under load.
Sorry for late reply I needed to ask my mechanic with your question.
He's going to try replacing the trigger next.
Any thoughts as to what to check would be appreciated

 

[Nerkabill]

It also is back firing through exhaust and not carbs

 

[Nerkabill]

Does it backfire from exhaust in neutral also or only in gear underway? Also are you sure it backfire or spitback thru carbs?

It back fires from exhaust not the carbs

 

[faztbullet]

Make sure firing order is correct as there is 2 different firing orders for 3 cylinders

 

[Nerkabill]

Make sure firing order is correct as there is 2 different firing orders for 3 cylinders

The firing order was wrong and my mechanic couldn't be right one. Now engine is runningbbetter then it ever had.
Thanks so much for your help in getting this fixed.