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  1. #1

    Cylinder temp of 1995 750SLT

    Hello and thank you for the opportunity to learn so much from this site.I have been given a CHT
    Gauge set up from an ultralight aircraft kit it consists of three T type thermocouples that are formed into washers that reside under the spark plug seat of each cylinder.There is athree way switch and a gauge to read cylinder temps.Question is does anyoen know what temp I should expect at this location and can I tune my engine using the readings.Thanks,I dont want to burn another PTO cylinder,dime sized hole right down the middle.By the way my Fuji engine is mounted in a 14 ft Grumman semi V aluminum boat.Thanks for any information .

  2. #2
    Click avatar for tech links/info K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Since the watercraft engine has water cooling right under the cylinder head cover, the spark plug shell temperatures may not change significantly relative to the cylinder internal temperatures.

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