Notes

Yamaha Flicker Plugs & Compression-- 100-Hour Service
Performing Yamaha ignition system as well as compression maintenance on your outboard is among the secrets to its general durability and also reliability.

Yamaha Spark Plugs Examination
As you remove the old ignition system, keep an eye on which connects originated from which cylinders. Keep in mind if the plug appears to be damp from water, oil, or fuel. Keep in mind if the plug exhibits proof of heavy carbon deposits, other fouling, or corrosion-- all a sign of other issues. If you were to take your engine to a supplier for 100-hour solution, this is the factor at which they would certainly execute a compression test by connecting a compression scale to the cylinders independently as well as utilizing the starter motor to turn the engine over and also examine its ability to pressurize the cyndrical tube. If you are going to do this examination at home, you will certainly either need a remote starter switch, or a buddy that can transform the ignition key with the kill lanyard got rid of. This cranking with the ignition disabled will additionally prime the fresh oil around the block, decreasing friction at start-up after the service is full. Repeat screening for all cylinders and also contrast outcomes. Analyses will certainly vary from scale to evaluate, so the test is more about determining the distinction in readings with excellent results being less than a 10 percent difference.

With the compression test completed-- or avoided-- you can now start installing your new ignition system. For simplicity of removal as well as to reduce the danger of thread damages to the cylinder head, apply a decline of oil with the idea of your finger to the strings of the plug making use of care to stay clear of wetting the electrode or porcelain facility of the plug. Thread the plugs into the cyndrical tube head by hand making use of caution not to go across string. NGK makes use of a crush washer that will certainly press down as well as give a limited seal as you tighten-- full torque is in between 18-21 ft. lbs. Reinstall the plug wires or coils in the same order as well as make use of a small amount of Yamaha oil for the threads of the bolts, coils and covers.
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