Page 1 of 3

Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Thu May 02, 2019 5:44 pm
by dogwspts
First run of the year at above plane 3500 RPMS started getting a low block pressure alarm and RPMS dropped. Checked all pickups and no blockage.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Thu May 02, 2019 5:53 pm
by ajcampen
Must be going into guardian mode. Call dealer and get on list for service. You r under warranty

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Thu May 02, 2019 8:58 pm
by akorcovelos
+1, they'll be codes if its going into limp mode, the dealer should be able to tell you whats up.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Thu May 02, 2019 9:35 pm
by Big Block Power
ajcampen wrote: Thu May 02, 2019 5:53 pm Must be going into guardian mode. Call dealer and get on list for service. You r under warranty
Yep what he said.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Thu May 02, 2019 10:21 pm
by cmattj
Big Block Power wrote: Thu May 02, 2019 9:35 pm
ajcampen wrote: Thu May 02, 2019 5:53 pm Must be going into guardian mode. Call dealer and get on list for service. You r under warranty
Yep what he said.
Yep I’m in. Water pressure threshold is low . How many hours? Stock impeller? Have you parked on sand bars but had to back off?
It’s under warranty so let us know.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Fri May 03, 2019 6:23 am
by Big Block Power
We only give free advice when it costs you money. No guessing on free stuff. 😂😂
In sure is a sensor or the impeller. What did they do for your winterization.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Fri May 03, 2019 1:45 pm
by dogwspts
Found problem removed water sensor on back of engine cleaned it out and all is well. Did get a little dock rash today messed up the letters on starboard side.

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Fri May 03, 2019 2:15 pm
by cmattj
dogwspts wrote: Fri May 03, 2019 1:45 pm Found problem removed water sensor on back of engine cleaned it out and all is well. Did get a little dock rash today messed up the letters on starboard side.
Nice , and no downtime.. letters are easy and gelcoat is fixable so your on your way to a “ pre disaster season”. Easy

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Fri May 03, 2019 7:21 pm
by Big Block Power
dogwspts wrote: Fri May 03, 2019 1:45 pm Found problem removed water sensor on back of engine cleaned it out and all is well. Did get a little dock rash today messed up the letters on starboard side.
A word of advise.
Never approach a dock faster than you want to hit it 😉

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Fri May 03, 2019 10:00 pm
by ajcampen
Big Block Power wrote: Fri May 03, 2019 7:21 pm
dogwspts wrote: Fri May 03, 2019 1:45 pm Found problem removed water sensor on back of engine cleaned it out and all is well. Did get a little dock rash today messed up the letters on starboard side.
A word of advise.
Never approach a dock faster than you want to hit it 😉
What about a garage? 🤣🤣

Too soon😤

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Sat May 04, 2019 6:43 am
by Big Block Power
ajcampen wrote: Fri May 03, 2019 10:00 pm
Big Block Power wrote: Fri May 03, 2019 7:21 pm
dogwspts wrote: Fri May 03, 2019 1:45 pm Found problem removed water sensor on back of engine cleaned it out and all is well. Did get a little dock rash today messed up the letters on starboard side.
A word of advise.
Never approach a dock faster than you want to hit it 😉
What about a garage? 🤣🤣

Too soon😤
Really! Really! Too soon!

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Sat May 04, 2019 8:08 am
by akorcovelos
:lol: :lol: :lol:

Cobalt 220 Tower “back up camera”

Posted: Sat May 04, 2019 8:14 am
by cmattj
:lol:

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Sat May 04, 2019 9:36 am
by AsLan7
.
:lol: :lol: Roger, too soon. :lol: :lol:

Re: Mercruser 4.5 Bravo 3 Low Block pressure Alarm

Posted: Sun May 05, 2019 6:57 am
by Ytmsn
Hahaaha! Good stuff!