RMM

If I were to check the riser and/or manifold temp with a laser temp guage what would be the right temps?

1988 Merc 454/Bravo I RWC

Thanks

GOODT

there really isnt a correct answer there are too many variables because some water bypasses the block and goes directly to the exaust, long and short of it is you should be able to rest your hand on top of the riser with no problems, normally the stb side runs a little hotter then port, 90s to low 100s are common

RMM

Really 90-100s? Wow even when was new know couldn't leave hand on riser for more than a few seconds.

GOODT

then you have issues or very sensitive hands