Mercruser 4.5 Bravo 3 Low Block pressure Alarm
Posted: Sat Feb 27, 2021 12:22 pm
Remember this post finally found a dealer he has it now. I will post if it can be fixed. Been haunting me for two years.
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Out of curiosity, what is your pressure?dogwspts wrote: Sat Feb 27, 2021 12:22 pm Remember this post finally found a dealer he has it now. I will post if it can be fixed. Been haunting me for two years.
Are you sure the correct impeller is installed? There are two versions. Your engine likely needs the earlier version....like minedogwspts wrote: Sat Feb 27, 2021 8:20 pm Idle at 3. 3000 for the first hour 18. then after about 30 min through a no wake zone and back to 3000 it drops to 8 and has been as low as 5.changed sensors and inpeller only 130 hours on motor.

Ok...as long as you used the correct factory impeller.
Bruce if you search his issues you will find about 10 threads in here. He has some specs in each of them. Sorry. This has been going on for 2 years like he said. Im still surprised he still owns this boat it would have been traded in a long time ago if it was me and no one had been able to fix it. Just me.bruceb58 wrote: Sun Feb 28, 2021 4:10 pmOk...as long as you used the correct factory impeller.
Did you do the flow test as outlined in the factory service manual? 1000rpm...15 second... I can't remember the volume. You have to do it in the water
Did they find a cause?
You were never on anyone's nerves. They are just disappointed that the dealers have not found a fix for you.dogwspts wrote: Sun Feb 28, 2021 6:33 pm Sorry if this got on someones nerves but . The boat does good except for this and I am going to find the problem.
+1dustinm wrote: Sun Feb 28, 2021 6:36 pmYou were never on anyone's nerves. They are just disappointed that the dealers have not found a fix for you.dogwspts wrote: Sun Feb 28, 2021 6:33 pm Sorry if this got on someones nerves but . The boat does good except for this and I am going to find the problem.
Correct is not on my nerves. You've gone after this for so long and it's not fixed! I give you credit to keep going after it. I just don't deal with headaches. I want to enjoy boating or what ever. So I would have moved on 2 years ago. Let's get it fixed and let's post the fix!ajcampen wrote: Sun Feb 28, 2021 6:41 pm+1dustinm wrote: Sun Feb 28, 2021 6:36 pmYou were never on anyone's nerves. They are just disappointed that the dealers have not found a fix for you.dogwspts wrote: Sun Feb 28, 2021 6:33 pm Sorry if this got on someones nerves but . The boat does good except for this and I am going to find the problem.