Hard starting - no spark - coil question

[bulkleycorp]

Hello,<br /><br />Troubleshooting a 1970 Johnson Seahorse 6HP - 6RL678. Have the Clymer manual, but need help.<br /><br />Very very hard to start. Have already checked fuel flow - good flow and already installed new fuel pump.<br /><br />Checked compression on both cylinders - one is about 70, the other high 70's.<br /><br />Checked spark (plugs are brand new and properly gapped)- lower cyliner is sparking - good blue strong spark, loud pop. Upper cylider - no spark from wire, no noise.<br /><br />Points/condenser are new and checked/double checked point gap (.020).<br /><br />Could the coil on the bad wire be bad? I pulled the flywheel. Coils are these big brown looking square modules, with a green metal bar surrounding it. Both look solid - no cracks.<br /><br />Plan on swapping the coils to see if the good coil will make the upper cylinder wire spark.<br /><br />Also wanted to confirm how to remove the coils properly as the manual doesn't seem to jive with what I have:<br /><br />I unscrewed the leads from coil<br />Removed the 3 screws from the green metal bar (is that the magnet?), and the coil pulled out - but the wire remained in place.<br /><br />Any help/insight appreciated.<br /><br />ALSO - does anyone know part number for replacement coil?<br /><br />Thanks.<br /><br />Rick

 

[marinemech]

Re: Hard starting - no spark - coil question

coil part number is 584477<br />good test to reverse coils <br />green metal bar is called laminatios flywheel contains the magnet<br />when installing coils: insert wire into coil make sure a good fit<br />place coil in position install screws<br />hold coil in line with area that they sit on so that flywheel will miss them(i wish i had a photo) tighten screws make sure wires aren't pinched and reconnect to points set flywheel on crank turn over to check for binding adjust coils if necessary good luck

 

[bulkleycorp]

Re: Hard starting - no spark - coil question

Thanks Marinemech,<br /><br />I just reversed the coils. Guess what? Now the top wire is firing strong, and the lower wire is not.<br /><br />Coil is bad. Will order new coil, and can't wait to fire her up!<br /><br />Rick