Plugs

[hitthebricks]

A few years ago when I replaced the plugs on my 200 Optimax a local dealer gave me a different plug saying that they no longer made that plug and this was the replacement for that one, so my next couple of changes have been that plug they gave me at that time because that is what I requested. This time I found the original plug and that it never was discontinued as they said. The motor has never idled very smooth since the change and havn't had a chance to get the boat on the water since to check it out. I was wondering if anyone knows what the difference between the NGK plug PZFR5F and a PZFR5F-11 would be?

HTB

[marine_man]

The -11 indicates a wide gap plug.

What year is your motor?

NGK shows the -11 version for a 1998 - 2002 200HP Optimax.

They show a IZFR5G for 2003 - 2006.

marine_man

[Northlander]

Hey marine man what NKG should I run on my 115 yamaha 4 stroke and what gap?

I ran ring free and now its time to switch them. I just want to make sure I have the correct ones. Its to rainy here to go check right now. Thanks man I love all your knowledge and great posts helping us with way less knowledge.

[boatfixer]

Steve,

LFR6A-11 if its a 4 stroke.

HTB

IZ is the Iridium plug

PZ is the platinum.

What was the original plug?

[hitthebricks]

its a 2001, now I have the correct plug again. thanks

[Northlander]

Steve,

LFR6A-11 if its a 4 stroke.

HTB

IZ is the Iridium plug

PZ is the platinum.

What was the original plug?

Ok thanks man Im all good. Just thought I would make sure ya know. Thanks again.

[SkunkedAgain]

As a rule, I always check the gap even if they are pre-gaped. Just this year, a local shop sold me new plugs for my '63 Seahorse. The guy said, "I gaped them for ya" and took my money. I got home and found that he was a moron. I'm glad that I double-checked. For the time it takes, make sure that they gaped correctly or your motor may run bad.

Of course, having the correct plug is Key #1.