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Alarm at acceleration
- Thread starter rock54
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Dr Honda
Well-Known Member
It can be a bunch of things. Since you have a 2004... the codes can be read out with a DDT or Rinda tool. If you have a Merc dealer close... they should be able to read them.
But with that said... what kind of alarm is it? (solid, beeping ??) What have you checked so far?
But with that said... what kind of alarm is it? (solid, beeping ??) What have you checked so far?
rock54
Member
Yes its a solid beeping alarm. Seems like maybe I picked up some weeds?? I went through a weedy area and as I was passing through, got a short beep.... turned it around and headed back to camp. Seemed ok, no vibration or power loss. Just that as I accelerated up, i got the continuous alarm, until i backed off the throttle. The only thing I’ve done so far was pull the fuel/water separator to inspect. It was clean and H2O free. This week i was gunna pull boat out of water and check for weeds. But like i said, its got full power. Also gunna order a temp sensor just in case.
Sandman251
Well-Known Member
Think it might be a low fuel alarm. Mine used to go off all the time whenever I made any sharp movements with 1/2 tank or less.
rock54
Member
I have a full tank. Maybe a new separator with sensor will do the trick. Ordering that and pulling boat out of water this week.
UKGlenn
Member
Could it be a low charge / voltage alarm, Had a similar thing for a while until the battery died completely. Ok at idle but as soon as i put any load on the engine the battery couldn't keep up not being charged. Symptons got progressively worse as the lack of voltage prevented the cylinders from firing properly. Problem was broken alternator belt. Didn't even notice it missing till i saw it in the bilge. Check back on my posts for replacement details.
rock54
Member
Thanks for the idea. Belt is good.Battery seems good, fires right up. Replaced both fuel filters and didnt solve problem. Matter of fact it has gotten worse and I haven’t even been running the boat! NOW it starts its continuous alarm immediately on take off! Not even time for it to warm up. Guess I’ll swap out battery and see what happens.
dblackstone
Well-Known Member
Sound like that solved the problem.
I'm also from Maine, I am over in Monmouth
I'm also from Maine, I am over in Monmouth
rock54
Member
Awesome. Before we bought our camp we used to go camping at beaver Brook campground periodically. Small world.
dblackstone
Well-Known Member
We live on Wilson Pond Rd near the Dam.
Somewhat new to the boat, only my second season. However have had this problem 2 yrs in a row with the belt. This weekend stranded me up river and had to call and get a Yamaha to toe me back in. Is it normal to have to replace the belt every season? Will carry a spare and 1/2 drive from now on.
UKGlenn
Member
Check for corrosion on the alternator pulley and under the flywheel. I replaced the alternator after my second belt and it hasnt caused a problem since. Old alternator had a slightly corroded pulley but i read somewhere also that if its bearings are poor you might not detect it by spinning it but under speed from the engine it could be adding resistance to the belt.
UKGlenn
Member
Definitely sounds like Alternator, As Dr Honda said you should be seeing c.13v across the battery when running. I managed to find a replacement by putting the manufacturing code into google and found the original alternator, Without the Mercury branding on the internet for 1/3rd of the price.
EvvyLodish
New Member
Hi...I have used the DN designation before with the shock pulse method for monitoring rolling element bearings. This technology looks at the shock values and translates the measurements to relative lubrication film thickness or rolling surface damage, whichever applies.
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