Spark Plugs Optimax 115

[jorgens98]

Hi<br /><br />I have a Mercury Optimax 115 from last year. In the manual it says, that I need to change the spark plugs after the first season (or 100 hours). But I get two different recommendations when I search the web. They are both from NGK and is called PZFR5F-11 or IZFR5G.<br /><br />Are they the same? - Or does it not matter which I choose?<br /><br />Yours sincerely<br /><br />Jan Jorgensen,<br />Denmark

 

[rabidfish]

Re: Spark Plugs Optimax 115

PZFR5F-11 is a platinum plug<br />IZFR5G is a Iridium plug<br /><br />They both have the same "heat range", but stick with the iridium plug. It's less susceptable to fouling during extended idling.

 

[jorgens98]

Re: Spark Plugs Optimax 115

Thanx for Your reply.<br /><br />I have now at least four different spark plugs on the list!!!!<br /><br />From Mercurys homepage (manuals): NGK PZFR5F – 11 <br /><br />From NGKs homepage: NGK IZFR5G <br /><br />From my own printed manual: NGK PZFR6H <br /><br />From Mercury Parts Express: NGK IZFR5J<br /><br />Are the last three also iridium - and where do I find this information?<br /><br />yours sincerely<br /><br />Jan Jorgensen,<br />Denmark

 

[rabidfish]

Re: Spark Plugs Optimax 115

"I" is for Iridium<br /><br />"P" is for platinum<br /><br />Mercury's part catalog calls for the NGK IZFR5J<br /><br />I would stick with it...

 

[jorgens98]

Re: Spark Plugs Optimax 115

Thanx - great - I will do that.<br /><br />Jan