1995 Black Max 175 EFI.
Been a little tough to start lately & running a bit rough. Pulled plugs and noticed bottom 2 on left side were pretty clean around the outer surface while the rest had normal carbon buildup. When I blew on these 2, a trace of water was evident. Immediately sprayed Deep Creep in each cylinder to avoid rust. Ran a compression test (motor was obviously cold as I didn't want to run it with water inside) with the following results:
Lside going down: 114, 115, 114 Rside: 118, 116, 115.
Normal range is 110-135 w/ warm block & no separation > 15 psi...so within limits.
Do I need to crack the head & replace head/water gaskets??
Appreciate any insight-am 99% sure it was water-the buildup around the threads was gray vs the normal brown/oily color on the other 4 plugs...
Thank you-
Lando
Been a little tough to start lately & running a bit rough. Pulled plugs and noticed bottom 2 on left side were pretty clean around the outer surface while the rest had normal carbon buildup. When I blew on these 2, a trace of water was evident. Immediately sprayed Deep Creep in each cylinder to avoid rust. Ran a compression test (motor was obviously cold as I didn't want to run it with water inside) with the following results:
Lside going down: 114, 115, 114 Rside: 118, 116, 115.
Normal range is 110-135 w/ warm block & no separation > 15 psi...so within limits.
Do I need to crack the head & replace head/water gaskets??
Appreciate any insight-am 99% sure it was water-the buildup around the threads was gray vs the normal brown/oily color on the other 4 plugs...
Thank you-
Lando