03 225 Opti high PSI

[clane1875]

Hi there,

So i just had several issues fixed ranging from replacing a compressor to injectors...
i have 3 engines, running yesterday noticed engine with new compressor(port) PSI was very high at 5000 rpms (24pSi). my center and starboard engines had an 18psi and 16 PSI.

What causes this?

boat seems to be pissing (sorry for lingo) fine under idle... i was alone on run yesterday so i couldn't tell if this changed underway

What should i look for as well?

Sorry terminology ~ not very mechanical

Chris

[EuropeanAM]

Chris:

Is it possible that the water pump was also changed?

In a triple engine application, it's not uncommon to see varied water pressures at higher RPM's (especially), as each engine is at a slightly different height, and achieves slightly different water flow characteristics (Ram Pressure) on the gearcase.

Although these engines only REQUIRE 15 psi at WOT (minimum), and the recommended pressure is 18+ psi at WOT.... there is no real harm in seeing 24 psi.

For more information on this topic, see the following post (written primarily for single engine applications- but the subject matter still applies):

http://www.bbcboards.net/zerothread?id=303474

[clane1875]

Thanks for the info Don

Chris