Spark plug recommendations.
Submitted by Ashen on Sat, 2015-06-13 11:47
Hi guys.
Just found out that the previous owner of my boat has been using incorrect plugs for the Johnson outboard. The plugs thats in the outboard are NGK BZ9HS-10. The correct plugs should be Champion QL78YC. Based on google, some people are using the NGK equivalent which are BZ8HS-10. Have found mixed online feedback for using Champion vs NGK. Champion plugs cost more than the NGK equivalent, $35 (for 4) as opposed to $20 (for 4) for the NGKs.
Which do you think I should buy and use??
____________________________________________________________________________
A fish in the hand is worth 10 in the water!
Marineboy
Posts: 845
Date Joined: 14/03/14
Spark plugs
hey mate I used to sell motor vehicle spare parts and Ngk was the preferred brand but saying that a spark plug is a spark plug it's like ford vs Holden everyone has their preference.
The difference between a BZ8HS and a 9 is only slight difference in heat range (can't remember if 8 is hotter or colder than 9) and it won't make massive difference th the performance of the engine.
My spots are so secret even the fish don't know about them !
Ashen
Posts: 1042
Date Joined: 22/03/13
Thanks for that info mate.
Thanks for that info mate. The plugs were changed in April last year so I'll buy a new set of 8HS and see how it goes.
A fish in the hand is worth 10 in the water!
Vinesh87
Posts: 2751
Date Joined: 02/04/11
Personally i would just buy
Personally i would just buy the reccomended ones for the extra $15
Ashen
Posts: 1042
Date Joined: 22/03/13
The extra $15 is not the
The extra $15 is not the issue. I just want to use the best plugs for the outboard. Even "maxrules" website (well known US outboard specialists) recommends NGK.
A fish in the hand is worth 10 in the water!
sarcasm0
Posts: 1396
Date Joined: 25/06/09
So maxrules knows better than the manufacturer?
?
Ashen
Posts: 1042
Date Joined: 22/03/13
I didnt say that... As
I didnt say that...
As stated there are many different feedback online (mostly in the US) with regards to which plugs are best for v4 outboards, hence why Im asking here, coz we all know FW members knows best! Haha
Anyhow, any members here running Johnson/Evinrude 2 stroke v4 outboards, please let me know what plugs youre using?
A fish in the hand is worth 10 in the water!
sarcasm0
Posts: 1396
Date Joined: 25/06/09
What model and year?
www.epc.brp.com
You can lookup all parts and schematics for the engine.
Bryan
Ashen
Posts: 1042
Date Joined: 22/03/13
The outboard is a mid 80s
The outboard is a mid 80s Johnson v4 120hp. Still goes very well for its age. Haha!
Thanks for the link. Will research a bit more on the plugs.
A fish in the hand is worth 10 in the water!
Marineboy
Posts: 845
Date Joined: 14/03/14
Spark plugs
are you guys aware that a QL78YC and a BZ8HS-10 are the same spark plug just different brand ?
My spots are so secret even the fish don't know about them !
Nath79
Posts: 15
Date Joined: 03/06/15
Plugs
yeah I am runnin bz8hs10 plugs as I have two eng so need 8 plugs seem fine so 30 bucks cheaper descent saving and change them pretty regularly prob 6 to 12 monthly
ranmar850
Posts: 2702
Date Joined: 12/08/12
heat ranges
With NGK, the higher the number the colder the plug, so an 8 is hotter than a 9. Spark plug quality in the basic ranges from all manufacturers now is pretty ordinary, not all that unsual to have them fail out of the box. I only use Iridium in all my motorbikes now for that reason--performance is no different in the older/lower tuned ones, but they will last. As for outboards, I'll leave that to the mechanic.