It is currently 20 Oct 2018, 16:58
Join the free forum or login with your account and the annoying banner goes away

eaglelodgemaine

All times are UTC - 5 hours [ DST ]




 Page 1 of 1 [ 12 posts ] 
Author Message
PostPosted: 13 Aug 2016, 04:29 
User avatar

Joined: 08 Jul 2015, 08:37
Posts: 97
Location: Greenfield, Indiana
I'm confused as what sparkplugs I should be using. So many websites say different ones. The motor currently has J8C champion plugs are these the correct ones or should I use something else? Any insight would be helpful.ImageImage

Sent from my XT1254 using Tapatalk


Offline
 Profile  
 
PostPosted: 13 Aug 2016, 09:46 
Donor
User avatar

Joined: 15 May 2010, 00:38
Posts: 2609
Location: Central Florida
J4C is the correct plug. The J8C is too hot for that application.
This comes directly from the book...no "Well, Bubba uses this one!"


Offline
 Profile  
 
PostPosted: 13 Aug 2016, 10:47 
User avatar

Joined: 08 Jul 2015, 08:37
Posts: 97
Location: Greenfield, Indiana
Pappy wrote:
J4C is the correct plug. The J8C is too hot for that application.
This comes directly from the book...no "Well, Bubba uses this one!"

Thanks pappy I don't know why some sites list the j8c. That's what was in the motor when I bought it I will pick up some of the right ones when I get off work.

Sent from my XT1254 using Tapatalk


Offline
 Profile  
 
PostPosted: 13 Aug 2016, 13:52 
User avatar

Joined: 27 Nov 2010, 09:36
Posts: 4597
Location: Houston, TX & Crossville, TN
Hay, Pappy....how's about explaining to me, and anyone else who is as dumb as me, when you need a "hot " plug and when you don't......

richg99

p.s. my 50 hp '96 Johnson has to run at idle 90% of the time due to the "no wake " limitations on my main lakes..



_________________
“Busy is a choice. Stress is a choice. Joy is a choice. Choose well.”.....Ann Voskamp
Offline
 Profile  
 
PostPosted: 13 Aug 2016, 16:01 

Joined: 05 Oct 2014, 13:19
Posts: 184
The easy answers can be found in a book. Easy, simple answers are good for persons who are not into wrenching or tuning ones equipment to real world usage. The op just wants the motor to run at factory specs.

Now some of us tune our boats to our normal running conditions. I run 4oz per gallon, up the main one and run one or two level hotter plug. What is the op going to do with that info but be confused.

...don't mean to answer for Pappy...



_________________
2 stroke every time I can
4 stroke only when I have to..I don't like boating with my lawn mower
Offline
 Profile  
 
PostPosted: 13 Aug 2016, 16:07 
User avatar

Joined: 27 Nov 2010, 09:36
Posts: 4597
Location: Houston, TX & Crossville, TN
OK I'm confused...

" I run 4oz per gallon, up the main one and run one or two level hotter plug."

"up the main one" ??????????

richg99



_________________
“Busy is a choice. Stress is a choice. Joy is a choice. Choose well.”.....Ann Voskamp
Offline
 Profile  
 
PostPosted: 13 Aug 2016, 16:09 
User avatar

Joined: 08 Jul 2015, 08:37
Posts: 97
Location: Greenfield, Indiana
I would like to know why you would want a hotter plug because maybe someone was trying to hide something like bad cylinders or they did a heck of alot of idling for trolling.

Sent from my XT1254 using Tapatalk


Offline
 Profile  
 
PostPosted: 13 Aug 2016, 16:34 

Joined: 05 Oct 2014, 13:19
Posts: 184
richg99 wrote:
OK I'm confused...

" I run 4oz per gallon, up the main one and run one or two level hotter plug."

"up the main one" ??????????

richg99


I have drills and 43 years of tuning everything that runs on gas, propane or oil. Boilers, weed whackers, saws and dirt track autos. Sometimes I use local terminology not used here. Sorry..

Did you eat something bad for you yesterday??



_________________
2 stroke every time I can
4 stroke only when I have to..I don't like boating with my lawn mower
Offline
 Profile  
 
PostPosted: 13 Aug 2016, 20:18 
Donor
User avatar

Joined: 15 May 2010, 00:38
Posts: 2609
Location: Central Florida
There is absolutely no need for a hotter plug in that engine. Can you run a J6C? Sure. Did I just contradict myself? In most of the older engines there was a recommendation for one step hotter plug for prolonged idle. This engine may or may not still fall into that category. A J8C? Nope.
The answer to prolonged idle is to make sure your thermostats are working properly first and foremost.
The engine needs to be good and warm at idle. If you are lucky enough to have TNT (tilt and trim) you can also
"tailor" your idle mixture some by trimming up or down while idling. Trimming up will lean the engine for cleaner running and vice versa. Try it. You will notice your RPM going up in about 10-15 seconds after trimming up and vice versa.
The issue you get into when going too hot with a plug would be piston damage. Not worth taking a chance when the other
controllable factors are quick and easy.


Offline
 Profile  
 
PostPosted: 15 Aug 2016, 18:13 
User avatar

Joined: 08 Jul 2015, 08:37
Posts: 97
Location: Greenfield, Indiana
Thank pappy

Sent from my XT1254 using Tapatalk


Offline
 Profile  
 
PostPosted: 17 Aug 2016, 20:44 
User avatar

Joined: 08 Jul 2015, 08:37
Posts: 97
Location: Greenfield, Indiana
I went out today and ran through 3 gallon of gas the new plugs in the right heat range made a heck of a difference thanks so much for your help

Sent from my XT1254 using Tapatalk


Offline
 Profile  
 
PostPosted: 18 Aug 2016, 09:11 
Donor
User avatar

Joined: 15 May 2010, 00:38
Posts: 2609
Location: Central Florida
rednecknproud21 wrote:
I went out today and ran through 3 gallon of gas the new plugs in the right heat range made a heck of a difference thanks so much for your help

Sent from my XT1254 using Tapatalk



You're welcome and thanks for getting back to us!


Offline
 Profile  
 
Display posts from previous:  Sort by  
 Page 1 of 1 [ 12 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 67 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Join the free forum or login with your account and the annoying banner goes away

BoatCoversDirect