1998 Ficht 90 Spark Plugs

[mihumihu]

Last year I bought a boat with a 1998 Evinrude Ficht 90 outboard, model number E90FPLEEC, serial number G04543482, engine family X1PXM0105220, non-pinned heads, ~600hr total. Now I want to replace the spark plugs and there seems to be a lot of different information available. What I have found our so far is

Installed: NGK 3741 PZFR5F Laser Platinum (picture of removed plug https://up.picr.de/33832552cd.png)
Emission control label: PZFR5F
´99 service manual: NGK PZFR5F
Most other info on the net: Champion 7712 (QC10PEP)
Some info suggests the QC12PEP might work better than the 7712 also in non-pinned heads (seahorse in http://www.bbcboards.net/showthread....ll=1#post81167)
For larger Ficht V6 engines the QC10WEP can be used (http://continuouswave.com/whaler/ref...gChart2008.pdf)

My current understanding is 7712 (QC10PEP) is the safe bet, QC12PEP might work a little better, QC10WEP lasts longer but is for the larger V6 Fichts only. Is this correct? Could I use the QC10WEP also in the smaller V4 Ficht? Advice and maybe even an explanation why would be really appreciated.

Thanks!
Michael

[ChampioNman]

Your motor is a 1999 model year "EE" no where on the plug chart does it say there is a optional plug for your motor. 7712 is the plug to use. The 7712 plug is not the same as QC10PEP that is part #958.

30	5000547	SPARK PLUG, Champion. Use 5001111 for 1998/99 90 & 115 hp Use 5001866 for 1999/2000 200 & 225 hp Use 5001111 for 1997 and non-updated 1998/99 150-175 Use 5001211 for all other 1998/99 updated with pin heads	4		Not Available

Part number 5001111 is Champion part number 7712. The parts manual is confusing during these model years as they were constantly changing the motors.

[mihumihu]

Thank you ChampioNman! Not only the parts manual is confusing. Trying to order #7712 (in Europe) I find

https://www.sparkplugs.com/Quickwatch.aspx?zpid=8396 lists #958 as QC10PEP (as you say)
https://www.sparkplugs.com/Quickwatch.aspx?zpid=8346 lists #7712 as QC10PEP (https://www.championautoparts.com refers to this when looking to buy #7712)
https://www.ebay.at/itm/Champion-QC1.../362163534533? lists #7712 as QC12PEP
https://www.sparkplugs.co.uk/champio...rk-plug-7712-1 says "Champion Marine Spark Plug Part Number 7712, QC12PEP"
http://www.fme-cat.com/overlays/part...lug&brandId=CP says #7712 is plug type QC12PEP
http://www.sparkplug-crossreference....-Plugs/5001111 says the BRP 5001111 is a Champion #7712 or QC12PEP

So #7712 #958 QC10PEP and QC12PEP are really all the same? ;)
Or are they close enough so it doesn´t matter what I order?

[ChampioNman]

No they are not the same plug.