04 200hp running rough

[Striperaddict]

model #E200FPLSRB
Ser. # 05041676
Motors on an 04 Champion 188 elite. Ive owned the boat since February and it has run great since with the exception of the EMM issue 2 months ago. (3 lights on gauge)

First off this is my first high horsepower boat so limited experience here.
I had the EMM repaired 2 months ago and this issue started 2 weeks ago. It is running rough sounds like a miss in gear up to about 1500 rpm. Also sluggish out of the hole now. Too speed still what it was 62mph alone with full livewells 5800rpm. Down a few mph from cooler temps. 100°+ here in Vegas.

I pulled the plugs this morning and all were indexed correctly by previous owner and QC12PEP. Hopefully the pics loaded. Do they look like they are firing correctly? Looking for some advise on what to check/test as I said Im new to troubleshooting with this engine.

Thanks in advance for your help.

[ChampioNman]

What's the gap on them? Color looks good. Newly installed plugs should be gapped at .028". Those motors don't like a lot of idling. You could change your thermostats and switch to the QC10WEP's which will help a lot. Tstat number is 5005440 you'll need 2.

[Striperaddict]

What's the gap on them? Color looks good. Newly installed plugs should be gapped at .028". Those motors don't like a lot of idling. You could change your thermostats and switch to the QC10WEP's which will help a lot. Tstat number is 5005440 you'll need 2.

I will check the gap shortly. Ive read about the plug and thermostat swap and will do that also. I always keep idling to a minimum actually just use trolling motor 90% of the time in no wake zones.
Thanks

[ELGIN]

From the looks of the plugs there is a bit of wear as a couple of the ground straps look like the have been burned down on the end.

[Bassmeister]

Those plugs don't last long..... it would be in your favor to go ahead and swap thermostats and get the qc10wep plugs for longer life.....both my engines would idle rough and die when shifting gears when the gap got too wide.....also check the exhaust pressure sensor for clogging.

[Striperaddict]

I have been shopping around for the new plugs. Cant find any local so Im going to order plugs and stats and go that route.

[Striperaddict]

From the looks of the plugs there is a bit of wear as a couple of the ground straps look like the have been burned down on the end.

I did notice the gap was wider on a few. I run her hard often so if the QC10WEP and new thermostats will extend life Im all in on that.
Thanks

[ChampioNman]

May help in your search to look for Champion 9005 that's the stocking number.

[Striperaddict]

May help in your search to look for Champion 9005 that's the stocking number.

Thanks
I found 8 at a decent price and the correct stats. Should be here tues/wed

[JoePA]

I get my plugs from NAPA and I get the QC10WEP for $6 a plug and that seems to be the best price I found. Amazon has them but DO NOT PURCHASE THEM FROM AMAZON!!! no protective piece on the plug and most just slop around in the bag with bent electrodes.

[Striperaddict]

Will it be an issue if I re gap these plugs and go run it tomorrow. Was just told I have the day off and wanna go fish.
The gaps are waaaaay off spec. Some are at .060! Just crazy big!

[ELGIN]

Gap them and run them.

[Striperaddict]

Gap them and run them.

Thanks again Elgin

[Striperaddict]

Re gapped and ran it today and she ran like a raped ape. Hopefully the new plugs and thermostats will help them last a bit longer.
Thanks again everyone

[Bassmeister]

Yea...the DFI's don't like wide gaps....Or clogged exhaust sensors.....the first time mine gets the hiccups or stalls while shifting gears when cold is my clue to start checking.....

[Striperaddict]

Im gonna install new plugs and thermostats this weekend. Any suggestion on gasket sealer on thermostat caps? Manual says to put it on the threads.
Silicone type?

[ChampioNman]

BRP Triple Guard grease

[ChampioNman]

Don't forget to index the plugs too.

[Striperaddict]

BRP Triple Guard grease

Will do thanks