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| What Spark Plugs For A ST P66D |
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Dale Kennedy
New member
Username: dale
Post Number: 2
Registered: 08-2012
| | Posted on Monday, August 20, 2012 - 08:06 pm: | 
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Hi does anybody know what spark plugs I should fit in my P66D 10 HP I've just had the carb serviced an got it going but there is some thing still wrong an old boy at the club said it maybe a hot and cold plug or high and low but he was not sure and one fits aft the other forehead but he didn't know for sure can any body assist me with my quest please |
robert tucker
Visitor
| | Posted on Tuesday, August 21, 2012 - 06:05 pm: |
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I used to own a P66C, bought new from ST, and the recommended plugs were Champion L90, these were supplied with the engine when purchased. Did also use NGKs but can't remember the type. It should fairly easy to determine the equivalent, motor factors have conversion charts. |
robert tucker
Visitor
| | Posted on Saturday, August 25, 2012 - 03:16 am: |
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Just checked on the NGK equivalent for the L90, it is B5HS. I found the NGKs to be longer lasting, but still used a lot of them over the years. Always keep several spares handy and be prepared to change them if starting is difficult. Cleaned and regapped plugs never seemed as good as new ones. |
Paul Vecovsky
Member
Username: paulvec
Post Number: 24
Registered: 02-2007
| | Posted on Sunday, August 26, 2012 - 04:17 am: |
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I've been using NGK B6HS without any problems! The B5HS would be a little hot for the ST low compression engines! once a plug fouls throw it away! |
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