| Author |
Message |
    
Ken Makela
New member
Username: kmakela
Post Number: 3
Registered: 04-2009
| | Posted on Tuesday, November 10, 2009 - 12:11 pm: | 
|
MY ENGINE IS NOT RUNNING ON THE TOP 2 CYLINDERS. I INSTALLED A NEW SWITCHBOX LAST SPRING AND IT RAN FINE AFTER INSTALLATION. I AM GETTING SPARK TO THE 2 PLUGS BUT THEY DO NOT SEEM TO FIRE OR ARE OUT OF TIME. CAN THE TIMING GET FOULED UP ON THESE ENGINES? (I AM GETTING GASOLINE TO ALL CYLINDERS, PULLED OFF BOTH CARB BOWLS.)THE PLUGS ARE NEW. |
RRB
Member
Username: arcrat
Post Number: 69
Registered: 01-2009
| | Posted on Wednesday, November 11, 2009 - 01:36 pm: |
|
Need a bit more info on motor year hp ?. what is comp. how far will spark jump ?
arcrat |
Ken Makela
Member
Username: kmakela
Post Number: 4
Registered: 04-2009
| | Posted on Wednesday, November 11, 2009 - 05:16 pm: |
|
IT IS A 1986 45 HP. HAVE NOT CHECKED COMPRESSION BUT I THINK IT IS OK. THE LAST TIME I RAN IT ABOUT A MONTH AGO IT WAS LOADING UP AT IDLE BUT REVVING WOULD CLEAR IT AND COULD GET FULL SPEED. THE SPARK JUMPS AT LEAST 1-1/2 INCHES. |
JB
Senior Member
Username: beckerjs
Post Number: 2042
Registered: 11-2005
| | Posted on Thursday, November 12, 2009 - 12:46 pm: |
|
spark, compression, carbs, no skipping test. I would do a cyl drop test if that all passes, which it probably won't.
http://www.themarinedoctor.com/cgi-bin//YaBB.pl?num=1144247599
The only other thing that hasn't been mentioned would be a reed problem. But fuel would be spitting back out the top carb if the top cyls are dead.
Were the main jets cleaned in both carbs or just the bowls removed. Without any gas to the cyls with the bad carb they get no oil. |
