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if you had a bad oil pump?
how many lines would be affected?
6 lines,6 intake fittings,6 cylinders.
we only have 3 cylinders affected.
now if I had a few recirc check valves,also known back in the days of chysler outboards as a PUDDLE drain system.
yep we could start affecting cylinders.
ask your tech which pulser coil fires #1 spark plug and which one fires #1 injector.
have him explain 1-6.
then ask him how the puddle drain system works.
you will get a glassey eyed look as no school I have been to for Yamaha since 2000 even mentions they exist.
much less what they do.
it is something a tech must trace out on paper all by themselves.
I did.
to test a check valve first you must know what pressure the valve break at.
then pressurize it in the flow direction.
it will break at or slightly above the listed PSI then fall back and hold that pressure when you quit pumping the tester.
but the voltage outputs from the pulser coil,TCI and injector drivers need to be monitored AT the FAILURE RPM AND LOAD.
wont matter at idle on the muffs.
to find the difference between what is a check valve and what is a nipple requires hunting on the parts diagram.
the hose routing may be found in the service manual.
it just does not identify the parts the hoses go to nor mention why some engineer put them there.
ya gotta break it in two.
is it a mechanical failure,a valve or a pump seal .
or is it an electrical failure?
how many lines would be affected?
6 lines,6 intake fittings,6 cylinders.
we only have 3 cylinders affected.
now if I had a few recirc check valves,also known back in the days of chysler outboards as a PUDDLE drain system.
yep we could start affecting cylinders.
ask your tech which pulser coil fires #1 spark plug and which one fires #1 injector.
have him explain 1-6.
then ask him how the puddle drain system works.
you will get a glassey eyed look as no school I have been to for Yamaha since 2000 even mentions they exist.
much less what they do.
it is something a tech must trace out on paper all by themselves.
I did.
to test a check valve first you must know what pressure the valve break at.
then pressurize it in the flow direction.
it will break at or slightly above the listed PSI then fall back and hold that pressure when you quit pumping the tester.
but the voltage outputs from the pulser coil,TCI and injector drivers need to be monitored AT the FAILURE RPM AND LOAD.
wont matter at idle on the muffs.
to find the difference between what is a check valve and what is a nipple requires hunting on the parts diagram.
the hose routing may be found in the service manual.
it just does not identify the parts the hoses go to nor mention why some engineer put them there.
ya gotta break it in two.
is it a mechanical failure,a valve or a pump seal .
or is it an electrical failure?
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