UL77V vs L16V on VRO equiped outboard?

[tmeyer]

Spark Plug chart lists these 2 numbers but a note says to use a QL plug. What do I use? Thanks for the help. Tim

[SEAHORSE]

What is model number of the engine in question?

[tmeyer]

Seahorse, it is a 1986 Evinrude XP150, Model #E150STLCDC, Serial #J1139334. Thanks, Tim

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tmeyer &raquo;</TD></TR><TR><TD CLASS="quote">Seahorse, it is a 1986 Evinrude XP150, Model #E150STLCDC, Serial #J1139334. Thanks, Tim</TD></TR></TABLE>


Back in the mid '80s the original VRO did not have a warning system, so RFI from sparkplugs was not a problem. Since then, all replacement pumps are equipped with the NO OIL FLOW alarm, so " Q " style suppressor plugs are required.

Use QL77JC4's for best resullts or the super expensive long lasting, but poor idling QL16V sparkplugs.

[tmeyer]

Thanks Seahorse, you have solved a 12 yr mystery for me.

[RUSTY63]

See...There is a use for QL77JC4 spark plugs......

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tmeyer &raquo;</TD></TR><TR><TD CLASS="quote">Thanks Seahorse, you have solved a 12 yr mystery for me. </TD></TR></TABLE>


things like that are easy for us who are both encyclopedias and dinosaurs!

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RUSTY63 &raquo;</TD></TR><TR><TD CLASS="quote">See...There is a use for QL77JC4 spark plugs......</TD></TR></TABLE>

of course, in non-looper situations !!!!!!!

[tmeyer]

Yes, from what I have been told, it is a crossflow.

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SEAHORSE &raquo;</TD></TR><TR><TD CLASS="quote">


Back in the mid '80s the original VRO did not have a warning system, so RFI from sparkplugs was not a problem. Since then, all replacement pumps are equipped with the NO OIL FLOW alarm, so " Q " style suppressor plugs are required.

Use QL77JC4's for best resullts or the super expensive long lasting, but poor idling QL16V sparkplugs.</TD></TR></TABLE>

I have the new OMS on my 1985 XP150 so, what problem does RFI from sparkplugs cause to the no oil flow alarm?

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DoferGofer &raquo;</TD></TR><TR><TD CLASS="quote">

I have the new OMS on my 1985 XP150 so, what problem does RFI from sparkplugs cause to the no oil flow alarm?
</TD></TR></TABLE>


The radio frequency interference (RFI) can affect the logic chip inside the "VRO-OMS" alarm module, causing a false warning signal. The same thing can happen from a cracked coil or arcing plug wire. On some engines, the RFI if its strong enough, can put the motor into the SLOW mode without any warning.

By the way, Dofer, I like your list of "toys". Have you ever added up the total number of pistons that you own?

[DoferGofer]

Would that be the reason that I sometime get a false signal especially if I wash my engine under the cowl?

32 cylinders to be exact

[Bassmeister]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DoferGofer &raquo;</TD></TR><TR><TD CLASS="quote">Would that be the reason that I sometime get a false signal especially if I wash my engine under the cowl?

32 cylinders to be exact

</TD></TR></TABLE>
Piston man!!!!