PIO KILDARE
Recruit
- Joined
- Jun 19, 2021
- Messages
- 5
Background first,
Replaced the water pump in March, then went for a fishing trip 2 weeks later.
No issues, engine ran fine for 6 hours. We were fishing for spoonbills so it was just above idle.
Then after we cleared a snag, the engine would start just fine and die with any attempt at acceleration. End of fishing trip BTW.
Over the last few months I have eliminated any possible cause of this problem.
What I found has surprised me, the left two cylinders are not firing. Engine does idle rough on just the right two cylinders.
Fuel, carbs are great, new kits, plenty of good gas.
Spark, awesome spark, pull the wires and the spark jumps a good 1/4 inch.
Also have replaced the power pack, optical sensor and plugs with the ones recommended by CDI for their modules.
Air, yeah no issues there.
This left only timing.
As mention previously, power pack, optical sensor and plugs are now new, but these replacements did not effect the symptoms at all, no change.
Now the fun part, what I found
Performing the Joe Reeves WOT method, I found the WOT was at 30 degrees BTC.
Per the sticker on top of the engine, it should be 20 degrees BTC.
I thought Hey, I found the problem.
But, ain't there always a but.
The timing adjustment are for the full throttle adjustment is fully at the counterclockwise setting, moving it clockwise increases the WOT above 30 degrees BTC.
At this point I am starting to think I have had an internal failure of some kind.
The timing indicator has a cotter key and it is intact.
Any suggestions?
Replaced the water pump in March, then went for a fishing trip 2 weeks later.
No issues, engine ran fine for 6 hours. We were fishing for spoonbills so it was just above idle.
Then after we cleared a snag, the engine would start just fine and die with any attempt at acceleration. End of fishing trip BTW.
Over the last few months I have eliminated any possible cause of this problem.
What I found has surprised me, the left two cylinders are not firing. Engine does idle rough on just the right two cylinders.
Fuel, carbs are great, new kits, plenty of good gas.
Spark, awesome spark, pull the wires and the spark jumps a good 1/4 inch.
Also have replaced the power pack, optical sensor and plugs with the ones recommended by CDI for their modules.
Air, yeah no issues there.
This left only timing.
As mention previously, power pack, optical sensor and plugs are now new, but these replacements did not effect the symptoms at all, no change.
Now the fun part, what I found
Performing the Joe Reeves WOT method, I found the WOT was at 30 degrees BTC.
Per the sticker on top of the engine, it should be 20 degrees BTC.
I thought Hey, I found the problem.
But, ain't there always a but.
The timing adjustment are for the full throttle adjustment is fully at the counterclockwise setting, moving it clockwise increases the WOT above 30 degrees BTC.
At this point I am starting to think I have had an internal failure of some kind.
The timing indicator has a cotter key and it is intact.
Any suggestions?