questions on water pressure gauge

stackz

Master Chief Petty Officer
Joined
May 29, 2008
Messages
830
ok, was reading the FAQ here:
http://forums.iboats.com/showthread.php?t=222677

its mainly about rerouting the peehole to the top of the block to keep air out of the water jackets...which makes sense. I will do that at a later date.

anyway, this is approximately what my outlet looks like now (taken from pic in that thread):
V4XflowLowoutlet.jpg

question #1
which would be the BETTER...not easier...BETTER way to tap for the water pressure gauge.

1. cut pee hole hose and put in a T fitting
2. pull out block tap and replace with a T-fitting at block

question #2
engine is a 1988 mercury M90 2-stroke 3cylinder engine

what would my approximately idle psi and full throttle psi be?? I want to make sure I get the right gauge since there are 0-15psi and 0-30psi gauges. if I'm only making 3psi at idle then obviously it would show up better on the lower pressure gauge versus the higher pressure gauge.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: questions on water pressure gauge

you need to split your post, OMC, Johnson/Evinrude in that forum. the Merc in Merc forum.

as far as the Pressure guage, it is the same, most are done with a "T" in the hose.
 
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