spark test

[Troyb56]

Re: spark test

I did that and cyl3 still had the problem. why would it not pick up at .30, but then pick up at .20, I know that .20 is not the right gap but it made adjusting the idle alot easier, but not all the way smooth. I don't want to leave it this way if it is not the correct way. When pulling the boots off 1 and 2 now, it bogs like it should and cyl3 gapped at .20 now bogs a little when boot pulled. Hey thanks for staying with me on this. My 17 yr old son is halfers on this project and I haven't been able to take him fishing on it yet, so thanks again

 

[Troyb56]

Re: spark test

Update, cyl 3 still not right, i took off carb and cleaned out the idle passage, put back on, no help. When you pull boot at idle no change, but when you fast throttle and pull the boot, it will bog like the other 2. Then I thought plug wire, so I changed cyl 3 and 2 plug wire and the problem stayed with cyl 3. Could this be a coil or points,

 

[Daviet]

Re: spark test

I think you only have one coil, so it should be OK. You could have a defective dist cap or rotor problem. Sometimes carbon would build up on the contacts and cause a problem. While you are in there check the gap on the points and make sure they are clean. Look for any carbon tracks on the cap or rotor and make sure there are no cracks around #3 wire connection.

 

[Troyb56]

Re: spark test

To pull the flywheel, is that an 1 1/2 nut, I will pull flywheel and check out what you said, again thanks for staying with me

 

[Daviet]

Re: spark test

I think it is a 1 5/16" nut, could be wrong, have been before.

 

[Troyb56]

Re: spark test

how many sets of points does this motor have

 

[Daviet]

Re: spark test

2 sets

 

[Troyb56]

Re: spark test

could I also swap the coils with another cyl and see if the problem follows. It has spark at all times but don't start running until I advance the throttle. I cant swear to this, because I have done so much troubleshooting, but I think I lost some power to the other cyl also, but right now 1 and 2 is good.

 

[Daviet]

Re: spark test

How many coils do you have? According to the parts break down you should only have one.

 

[Troyb56]

Re: spark test

yes sorry, 1 coil, 2 points. I did spray fuel into each cyl while idling and 1,2 started to flood and cyl 3 nothing. Would the points cause just this one cyl not to run on idle and run on advanced throttle. It is like the voltage picks up on the bad cyl when throttle advanced and runs good then

 

[Daviet]

Re: spark test

Just a thought, where does the pulse line for your fuel pump come off of the block at, #3 cylinder maybe? Follow the line on the pump and see if it goes to #3 cylinder. If the diaphragm in the pump is leaking it could be flooding the cylinder. Remove the line at the block and see if there is any gas in it.

 

[Troyb56]

Re: spark test

also my battery voltage was 11.9, I heard this could also contribute to ignition problems. you think the battery could do this

 

[Daviet]

Re: spark test

Your voltage is marginal, is the charging system working on your engine?

 

[Troyb56]

Re: spark test

That i wouldn't know all we have been able to do is work on it, only had it on water about 1/2 hr

 

[Troyb56]

Re: spark test

ok, pulled off flywheel and gapped points at .010 and found 1 wire that had some insulation a little cut on the wire that runs from one set of points to the other, fixed that wire and put back together, wont start now, I have fire to all three cyl with spark test guage. plenty of fuel as plugs where wet when pulled, distubutor looked good as far as I could tell, it did have 1 small notch in very bottom.

 

[Troyb56]

Re: spark test

Ok, got motor started again after gapping points again, same problem, so I swithched the bottome carb with the top and the problem followed the carb, now cyl 1 not running, I am thinking no fuel at idle, plenty of fuel when throttle advance as I can see it spraying when butterfly opens, I took out idle screw and sprayed carb cleaner and air and all 3 little holes where clear, also blew through hole on carb, next to screw hole where bowl screw on and also was clear, but i do not see how any gas gets through this hole when the gasket seals the bowl to the carb, the gasket is on the inside of this hole.