| www.iFourWinns.com https://www.smwebhead.com/phpBB3/ |
|
| Hotter Plugs in a 2 Stroke - Problem? https://www.smwebhead.com/phpBB3/viewtopic.php?f=21&t=14438 |
Page 1 of 1 |
| Author: | DougT01 [ Wed Sep 02, 2015 8:54 am ] |
| Post subject: | Hotter Plugs in a 2 Stroke - Problem? |
Hi guys, a quick question. 2003 Johnson 90hp 2 stroke By mistake I got an 8 pack of Champion QL87YC plugs versus QL78YC. The higher 87 number is a hotter plug. Everything else about the plug is identical. Is it a problem to run these hotter plugs? I'd obviously like to use them if possible, but don't want to do any damage. I was wondering if these hotter plugs could affect the lubrication in the cylinders or not enough to matter. Best regards, Doug |
|
| Author: | DougT01 [ Wed Sep 02, 2015 9:48 am ] |
| Post subject: | Re: Hotter Plugs in a 2 Stroke - Problem? |
Trying to research this answer, I found mixed results. When I called a local Johnson mechanic, his answer was simply to use what the manual called for. I finally got a hold of Evenrude Tech support and they said these 87's may be a little to hot for my engine and could cause premature firing. Now I have an 8 pack of the 78's on order. Better to waste $25 worth of plugs than to do some damage. I wish they would have been ok for a limited period of time  FYI, Doug |
|
| Author: | 278TheNiseeII [ Wed Sep 02, 2015 4:34 pm ] |
| Post subject: | Re: Hotter Plugs in a 2 Stroke - Problem? |
I would not use them. Hotter plug can easily lead to pre detonation which will burn a hole in the top of the piston. I have seen this before. |
|
| Author: | DougT01 [ Wed Sep 02, 2015 5:15 pm ] |
| Post subject: | Re: Hotter Plugs in a 2 Stroke - Problem? |
278TheNiseeII wrote: I would not use them. Hotter plug can easily lead to pre detonation which will burn a hole in the top of the piston. I have seen this before. Thanks Goldfish, I already ordered the correct ones and I'll try to give these away. Not worth $25 to damage the engine. Best regards, Doug |
|
| Author: | LouC [ Wed Sep 02, 2015 8:45 pm ] |
| Post subject: | Re: Hotter Plugs in a 2 Stroke - Problem? |
You made the right decision, hotter plugs in a 2 stroke could be a bad thing, especially if the fuel mix was a bit on the lean side. They usually have too hot combustion chamber issues, not too cold. |
|
| Page 1 of 1 | All times are UTC - 6 hours [ DST ] |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|