Post by Neil on Jan 2, 2007 6:04:30 GMT
Picked up some info along the way thought it might be usefull.
Outboard Wont Start:
1. Electric start: Does the starter engage and rotate the flywheel at a good (normal) speed? If yes, go to 2.
* Does starter spin, but bendix gear (small gear on starter shaft) does not engage the flywheel? Lubricate bendix spiral shaft.
* Does the solenoid click?
* If yes, measure voltage at the starter terminal to battery ground with starter engaged.
* If 12 V, repair or replace starter.
* If less than 9V measure voltage at large solenoid input terminal (from battery).
* If less than 9V, go to 3. If 12V, replace solenoid.
* Solenoid does not click when key is turned to start. Measure voltage at small solenoid terminal.
* 0 volts? Troubleshoot kill switch (lanyard connected?), battery, starter switch and neutral start switch in controller.
* 12 volts? Replace solenoid.
2. Flywheel rotates but engine does not attempt to start. Electric and manual start.
* Remove a spark plug, reconnect it and hold it against engine block. Keep it there while turning engine over. Does it make a hot, blue spark when attempting to start? If no, troubleshoot ignition system.
* Has hot, blue spark. Squirt some fuel mix (NOT ether) into the carb(s). Does it attempt to start?
* If yes, you have inadequate fuel. Troubleshoot fuel system and review starting procedure.
* If no, check that carb is not flooding from failed float needle.
* Still wont attempt to start. Check compression. If bad, troubleshoot mechanicals.
* Good compression on all cylinders. Check flywheel for sheared key, check crankcase for sealing at carb(s), inlet manifold and bypass covers.
3. Low voltage at starter when engaged.
* Measure voltage at battery terminals. If below 12.6 volts with all electrics turned off, recharge or replace battery.
* Measure battery voltage with starter engaged. If below 9 volts, recharge or replace battery.
* Remove and clean connections on battery-to-solenoid cable, battery-to-engine block cable and solenoid-to-starter cable. While they are off, inspect each for corrosion, broken insulation with corrosion and weak points. Replace corroded or weak cables.
* If problem persists, remove starter and clean all surfaces where engine block and starter connect.
Outboard Wont Start:
1. Electric start: Does the starter engage and rotate the flywheel at a good (normal) speed? If yes, go to 2.
* Does starter spin, but bendix gear (small gear on starter shaft) does not engage the flywheel? Lubricate bendix spiral shaft.
* Does the solenoid click?
* If yes, measure voltage at the starter terminal to battery ground with starter engaged.
* If 12 V, repair or replace starter.
* If less than 9V measure voltage at large solenoid input terminal (from battery).
* If less than 9V, go to 3. If 12V, replace solenoid.
* Solenoid does not click when key is turned to start. Measure voltage at small solenoid terminal.
* 0 volts? Troubleshoot kill switch (lanyard connected?), battery, starter switch and neutral start switch in controller.
* 12 volts? Replace solenoid.
2. Flywheel rotates but engine does not attempt to start. Electric and manual start.
* Remove a spark plug, reconnect it and hold it against engine block. Keep it there while turning engine over. Does it make a hot, blue spark when attempting to start? If no, troubleshoot ignition system.
* Has hot, blue spark. Squirt some fuel mix (NOT ether) into the carb(s). Does it attempt to start?
* If yes, you have inadequate fuel. Troubleshoot fuel system and review starting procedure.
* If no, check that carb is not flooding from failed float needle.
* Still wont attempt to start. Check compression. If bad, troubleshoot mechanicals.
* Good compression on all cylinders. Check flywheel for sheared key, check crankcase for sealing at carb(s), inlet manifold and bypass covers.
3. Low voltage at starter when engaged.
* Measure voltage at battery terminals. If below 12.6 volts with all electrics turned off, recharge or replace battery.
* Measure battery voltage with starter engaged. If below 9 volts, recharge or replace battery.
* Remove and clean connections on battery-to-solenoid cable, battery-to-engine block cable and solenoid-to-starter cable. While they are off, inspect each for corrosion, broken insulation with corrosion and weak points. Replace corroded or weak cables.
* If problem persists, remove starter and clean all surfaces where engine block and starter connect.
