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jeffk · 05-04-2018, 05:40 PM

Just did a quick look online and the first may be a water pressure gauge for the cooling system. Supposedly it is common to vary in pressure from very low at low engine speed to 25 or so at WOT. Different engines handle it differently. Yamaha engines hold around 11. Why do you think it is "off". Does it read differently than it has in the past?

Here's a link https://www.texassaltwaterfishingmag...pressure-gauge

I don't have any experience but the article says basically, see what is normal for your boat and if it changes, check it out.

05-04-2018, 05:40 PM	#4
jeffk Senior Member Join Date: Feb 2004 Location: Center Harbor Posts: 1,130 Thanks: 201 Thanked 421 Times in 239 Posts	Just did a quick look online and the first may be a water pressure gauge for the cooling system. Supposedly it is common to vary in pressure from very low at low engine speed to 25 or so at WOT. Different engines handle it differently. Yamaha engines hold around 11. Why do you think it is "off". Does it read differently than it has in the past? Here's a link https://www.texassaltwaterfishingmag...pressure-gauge I don't have any experience but the article says basically, see what is normal for your boat and if it changes, check it out.