| Author |
Message |
    
Debbie Glyptis
Member
Username: bream_master
Post Number: 4
Registered: 06-2009
| | Posted on Thursday, July 02, 2009 - 09:12 pm: | 
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GDAY TO ALL,I have a johnson 35hp {model 35el78r}my question to the pros is,should i b using NGK's or stick to original QL77JC4,im currently using NGK [N7HS-10]Friends and what not, are saying to stick with NGK others tell me use champion,ANY HELP would b great cheers. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3874
Registered: 04-2006
| | Posted on Thursday, July 02, 2009 - 09:31 pm: |
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As long as You do not install anything with 'R' from NGK, You may use what is available. I would however gapped them from 1.00m to 0,8mm. |
nicknack2
Advanced Member
Username: nicknack2
Post Number: 211
Registered: 08-2008
| | Posted on Thursday, July 02, 2009 - 11:57 pm: |
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Morten, why is an R rated plug not recommended??? |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3876
Registered: 04-2006
| | Posted on Friday, July 03, 2009 - 12:32 am: |
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The plug wires and coils are not designed to hold the Voltage built up in a 'R' (Resistor) plug. As a result You may get sparks jumping where You do not want them to jump, like into the coil primary (from Power-Pack), alarm (From temp) etc. It is an official a warning on VRO engines, as it may ruin/trigger false alarms.
If You feel for it, install one and then touch the plug wire.
After that You may have two things to do:
1: Call Your dentist and have all fillings reinstalled as they may have jumped out.
2: Call Your dealer and order a new power-pack! |
nicknack2
Advanced Member
Username: nicknack2
Post Number: 213
Registered: 08-2008
| | Posted on Friday, July 03, 2009 - 12:42 am: |
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hahaha, I was just curios, there are many myths out there where people states "just run an R plug to get a hotter spark and your smoke at idle will go away"... |
Debbie Glyptis
Member
Username: bream_master
Post Number: 5
Registered: 06-2009
| | Posted on Friday, July 03, 2009 - 02:28 am: |
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still the question remains to b aswered,which plug has better overall performance NGK or CHAMPION..... CHEERS |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3878
Registered: 04-2006
| | Posted on Friday, July 03, 2009 - 02:42 am: |
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Champion is the 'designed' plug for the engine. You may however even in OMC own material find NGK plugs, but mainly intended for markets where Champion are difficult to get.
To my experience: Champion L77JC4 or QL77JC4. Gapped at 0,8mm or .030" |
Debbie Glyptis
Member
Username: bream_master
Post Number: 6
Registered: 06-2009
| | Posted on Friday, July 03, 2009 - 04:44 am: |
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Thanks for all the advice WELL DONE.....cheers |
VicS
Advanced Member
Username: vics
Post Number: 559
Registered: 05-2008
| | Posted on Friday, July 03, 2009 - 05:07 am: |
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Yes QL77JC4 is the correct plug although originally supplied with surface gapped L78V plugs I believe
The Q denotes inductive suppression. Resistive suppression is not suitable for CDI ignition systems
(L77JC4 could be used if a non suppressed plug is adequate)
The equivalent NGK plugs are BZ7HS-10. ( B7HS-10 are non suppressed.)
Technical article about plugs for CDI systems here http://members.iinet.net.au/~pauldawson/iame26-spark-plugs.PDF |
