secondary windings on both coils just out of tolerance

[martinphantom]

25hp johnson 86 model(electric start tiller model)-poor low speed performance. Just checked coils per manual-one read 268 the other 270-manual says 275+50(275-325??) also checked the charge coil and it tested 600-manual says for electric start it should be 475+75(475-550)correct????? I need to purchase three coils?????Just checking with someone before I spend money on parts????

 

[rodbolt]

Re: secondary windings on both coils just out of tolerance

I doubt it. your numbers are close enough to work. what is your actual problem ? its usually a fuel problem rather than ign on a CD type system. usually a CD system works or it dont. can you determine if the problem is a rich running or lean running? find the DVA adapter to fit your DVM and test the pack output voltage to the coil primaries. or find someone with a KV tester and test the secondary output voltage. with decent plugs you should see 5-8 Kv at the plugs. if you do its not ign. its a quick way to eliminate ign system failures.<br />can you describe poor performance at low speed better ?

 

[martinphantom]

Re: secondary windings on both coils just out of tolerance

DVA adapter? KV tester? The engine has always ran great at WOT and starts and idles fine but at low speeds it has always ran rough-never smooth. When twisting the throttle it will finally smooth up and take off when the cam roller leaves the armature plate. Did a carb kit(carb was very clean inside). Runs exactly the same. New plugs(gapped at 40). Did a cam roller adj. No help. Replaced fuel lines-no help. Checked fuel pump screen-clean. I've owned it about 8 years and it's always ran this way. Now I've noticed it spits water until about half throttle then almost quits-some trickles out the two holes about a foot below the normal water discharge. Resumes normal discharge when you back off throttle. Occasional white puffs of smome. Wondering about head gasket now?

 

[rodbolt]

Re: secondary windings on both coils just out of tolerance

I would treat your two problems.<br /> you dont have a single one.<br />you have a cooling system issue as well as a fuel issue.

 

[kajnjim]

Re: secondary windings on both coils just out of tolerance

MP,<br />Have you been able to figure out anything regarding your water discharge problem yet?