Re: V4 90 No Spark
In all probability, it is a solid state electronic ignition setup. You need to obtain a service manual for the engine to aquaint yourself with it in order to avoid any expensive mistakes.<br /><br />Look on the port (left) transom bracket (bracket that bolts engine to boat) for a small plate which will have the "Model" and "Serial" number on it. There may also be a core plug on the top port portion of the powerhead near the head gasket that has those numbers on it.<br /><br />We need the "Model" number in order to identify the engine.<br /><br />In the meantime, remove the spark plugs, rig up a spark gap tester whereas you can set a 7/16" gap. Have one end of the tester wires connected to a spark plug boot terminal, the other wire from the tester to as powerhead ground.<br /><br />Crank the engine and observe the spark. If no spark, or if the spark is weak, disconnect the main RED electrical connector at the engine. Now using a small jumper from the battery terminal of the starter solenoid to the 3/8" nut terminal of the solenoid that engages the solenoid (not the 3/8" ground nut), crank the engine again and observe the spark.<br /><br />If you now have spark, the usual problem is that a short exists in the ignition switch, in which case replace the switch. If still no spark, it's usually a case that either the engine is cranking too slow or the stator under the flywheel is faulty.<br /><br />That terminal block with its five terminals or so has nothing to do with the ignition. Leave it be until you understand the engines functions!
