I have an alarm going off after running for an extended period of time. Not beating on the boat but after running 4500 rpms during a poker run ill get an alarm and slight loss of power. When I come off the throttle the alarm goes away. Any help would be great. I have merc 525's and xr's.
Thread: Alarms on 525's
Results 1 to 11 of 11
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09-03-2009 10:16 PM
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09-03-2009 10:51 PM
Sounds like a temp spike, either water, antifreeze, or oil. Could be a bad sender.
The motor is going into limp mode, restricting you to 75% power.
Only way to find out for sure is to hook it up to a computer scanner.Brian Tillett; Active Thunder Factory Representative
wwwActiveThunderBoats.com
brian(a)activethunderboats.com
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09-03-2009 11:01 PM
yep, sounds like temp spike to me to. Is that closed cooing or raw water? I had a very similar problem with the 525's in the Donzi. Turned out to be a loose hose letting air into the system. Not enough to make it run hot but enough to allow a big temp swing at the sensors. Mine has two different sensors, one for the gauge and one for the warning buzzer. Gauge read fine but shooting temp gun at the sensors showed 160 at one and 190 at the other.
Throttles- Cleveland Construction/Traffic Light Racing 377 Talon cat
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09-03-2009 11:23 PM
Its closed cooling. Makes sence. Now I just have to find someone to fix it before cumberland. Never a problem unless running for a while.
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09-03-2009 11:38 PM
If you have fresh water flush fittings, make sure everything is clear and closed and sealed when running. If one is sucking air, it could do weird things like this with temp spikes.
How is your water pressure? Same on both sides?Brian Tillett; Active Thunder Factory Representative
wwwActiveThunderBoats.com
brian(a)activethunderboats.com
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09-04-2009 12:18 AM
Because the alarm goes away when you get off the sticks it most likely is oil pressure/ water temp.Is the oil over full? it will expand when hot if the crank throws start hitting it it can airate.This will cause bubbles in the oil when the bubbles go past the sensor they will be read as no oil pressure.
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Mahopac Marina
Outerlimits/Sunsation & Stingray Dealer
www.mahopacmarina.com 845-628-6550 sales@mahopacmarina.com
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09-04-2009 10:44 AM
I've been keeping it elsewhere. He tried chasing this last year a little, came up with nothing. Really hasnt been a issue for me because I do so few poker runs. Mahopac boys been taking care of her this year and exceeding expectations. Worth the drive. Im just the worlds biggest procrastinator when it comes to boating.
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09-05-2009 01:53 AM
Let me know what you find but one of my 6.2s did the same thing once.The fact that the alarm goes away when you lower rpm it is not a constant alarm that would require shutting the engine off.I had just topped of the oil then ran for about 20 miles you might want to check your oil temp and see if the is a relation.