I haven't used the Bosch plugs for a long time but if my memory is correct it is essential to use an extra 14mm copper washer. If you don't, deposits will build up on the little bit of thread which pokes into the cylinder and then strip the thread in the heads when you try to wind them out.,
regards Rob Rob Thompson 0429 493 828 On Sat, May 6, 2023 at 8:17 AM Michael Stockhill <[email protected]> wrote: > Thanks immensely, Rob > > On Fri, May 5, 2023, 3:47 PM Rob Thompson <[email protected]> wrote: > >> Here is the link to the Limbach service bulletin when they changed from >> the Bosch WB4A to Eyquem plugs. >> >> https://limflug.de/en/support/downloads.php?type=technicalBulletins&id=905.700.051.005.pdf&action=download >> >> ....and then they changed to their own Limbach branded plugs. >> >> https://limflug.de/en/support/downloads.php?type=technicalBulletins&id=905.700.063.505.pdf&action=download >> >> I suspect the changes were for commercial rather than technical reasons. >> >> regards >> Rob >> >> Rob Thompson >> 0429 493 828 >> >> >> >> On Sat, May 6, 2023 at 6:38 AM Michael Stockhill <[email protected]> >> wrote: >> >>> Oops. The Bosch number is WB4A that I have. >>> >>> Michael >>> >>> On Fri, May 5, 2023 at 11:56 AM Michael Stockhill <[email protected]> >>> wrote: >>> >>>> My Eyquem A755 spark plugs are aging about the same as me. I am looking >>>> for a substitute. I have some Bosch EBC G7. Are they suitable? Does >>>> someone have a suggestion for replacements? >>>> >>>> Thanks >>>> >>>> Michael Stockhill >>>> Polson, MT USA >>>> >>>
