How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Charles Your Own Question
Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3612
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
67216606
Type Your Boat Question Here...
Charles is online now
A new question is answered every 9 seconds

I have a Mercury 200hp Outboard Optimax. Its got one ,

Customer Question

I have a Mercury 200hp Outboard Optimax. Its got one long, continuous pulsating beep & it will not crank. What's wrong? PLease help.
Submitted: 1 year ago.
Category: Boat
Expert:  Charles replied 1 year ago.

Hello, my name is***** will assist you.

Will the engine spin over and not start, or will it not spin at all?

Would you please post the serial number of the engine?

Customer: replied 1 year ago.
qto19765 it spins over great just wont crank. it has a loud contuis pulsating alarm as soon as you turn the key
Expert:  Charles replied 1 year ago.

The serial number will start with a 0 or a 1, followed by a letter, then 6 more numbers. Or do you know the year of the engine?

Customer: replied 1 year ago.
1999
Expert:  Charles replied 1 year ago.

Ok thanks. first thing to look at is the kill switch in the boat. Make sure that it is fully in the run position.

Then I will need to know the CCA size on the battery.

Customer: replied 1 year ago.
do i have a kill switch and if so where would it be? i dont see anything around the ignition key like all my boats in the past. i have two new batteries 845cca. two weeks old
Expert:  Charles replied 1 year ago.

What control box do you have?

Can you post a pic of the dash and control here?

Customer: replied 1 year ago.
Mercury Quicksilver controls.
Expert:  Charles replied 1 year ago.

Your not trying to start in gear are you?

Expert:  Charles replied 1 year ago.

when did the engine last run?

Customer: replied 1 year ago.
No, it won't spin over in gear. i just got the boat back from a mechanic of sorts. i had to have the 80 gallon tank cut out of the floor and replaced. i just this morning got a new starter installed. he was either busy or slow so to answer your question it hasnt been crunk and running in 12 months. im not sure if this boat had a kill switch. but if it did i cant see where it would go. however i do notice something missing from my boat keys since i got it back but im not sure what
Expert:  Charles replied 1 year ago.

Do you hear the fuel pumps run when you turn the key on?

Can you get into the console and locate the black/yellow wires and make sure that they are connected properly and not to a black?

Customer: replied 1 year ago.
i cant hear anything with the alarm screaming the second you touch the key
Expert:  Charles replied 1 year ago.

If you have a helper, remove the engine hood, then have them turn the key from off to ON, you should hear 2 pumps turn on.

Customer: replied 1 year ago.
the wires come out of the ignition and go directly into a cluster headed under the floor of the boat
Expert:  Charles replied 1 year ago.

Yes, in that cluster is a black and yellow wire, this is the kill circuit.

Can you test the pumps, and while your on the engine, check all the fuses.

Customer: replied 1 year ago.
both pumps seem to be coming on. one on each side of the engine
Customer: replied 1 year ago.
i have one cluster of fuses at the engine. all 20 amp. all 4 fuses are good
Customer: replied 1 year ago.
these wires arent plug type wires they are hard wired
Expert:  Charles replied 1 year ago.

The wires you mention, is that the key switch wires?

Customer: replied 1 year ago.
Expert:  Charles replied 1 year ago.

ok, Can you test it for spark?

Customer: replied 1 year ago.
all six are firing
Expert:  Charles replied 1 year ago.

Is this alarm beeping or solid in tone?

Customer: replied 1 year ago.
its constant but pulsating in tone
Expert:  Charles replied 1 year ago.

Ok, Locate the oil tank on the engine, unplug it and see if the alarm stops. If not, remove the fuel filter canister filter, and pour it into a glass jar. See if you have any water in it.

Customer: replied 1 year ago.
all this on the fuel side is brand new. filter tank and hoses. the alarm on the oil tank when it goes off isnt constant. i found that out the hard way. but i will go check it tho
Customer: replied 1 year ago.
ok i unplug the oil tank and the constant beep went away. now i hear 4 intermittent beeps
Customer: replied 1 year ago.
gas filter seems to be clear of water and debris
Expert:  Charles replied 1 year ago.

Ok, Can you test the battery power going to the engine?

Sorry about the delay, I lost power.

Customer: replied 1 year ago.
8.2 while trying to crank. 12.5
Customer: replied 1 year ago.
12.5 before you spin it over
Expert:  Charles replied 1 year ago.

Ok, these engines need at least 9.5 to the ECU to even start. Try a set of jumper cables from the battery to the engine. See it if will then start. If it does, you either have dirty connections or bad battery cables.

Customer: replied 1 year ago.
i dont have jumper cables that long. would it be safe to jump it off from my truck
Expert:  Charles replied 1 year ago.

Yes, you can use the truck battery. Place the red from the cables on the red of the starter solenoid, the black to a good engine ground.

Customer: replied 1 year ago.
now its spinning over at 9.7. alarm still going off. 4 pulsating beeps and 1 long constant beep afterwards
Expert:  Charles replied 1 year ago.

Did it start?

Customer: replied 1 year ago.
didnt even try
Expert:  Charles replied 1 year ago.

Put some water to it and give it a go.

Customer: replied 1 year ago.
i did that it sounds like it occasionally wants to fire but the alarm isnt stopping
Expert:  Charles replied 1 year ago.

Look at the temp senders on the cylinder heads and the air compressor. Make sure that all of them have all 3 wires plugged in.

With the key on, engine off, with the alarm going off, move the throttle let me know if the alarm stops.

Customer: replied 1 year ago.
help me with temp senders. im not sure what they are. however i checked every wire and harness i saw. i checked the alarm its coming on and off 4 times and nothing else. the throttle didnt stop the beeping
Customer: replied 1 year ago.
this all seems to be plugged in
Expert:  Charles replied 1 year ago.

There is also one on the air compressor. Looks just like the other 2.

Customer: replied 1 year ago.
its plugged tight as well
Expert:  Charles replied 1 year ago.

Check to make sure that the TPS, air temp, the coil drivers and the coils. are all plugged in as well.

Customer: replied 1 year ago.
ok it all seems to be plugged in secure
Expert:  Charles replied 1 year ago.

Alright, is the oil tank still unplugged?

Customer: replied 1 year ago.
no
Expert:  Charles replied 1 year ago.

Alarm still sounds?

Customer: replied 1 year ago.
but not constant. 4 beeps then it goes off
Expert:  Charles replied 1 year ago.

Is that a 4 light warning light in the dash? Does it work?

Customer: replied 1 year ago.
my light doesnt work
Expert:  Charles replied 1 year ago.

That would really help here. Do you think it may only be the bulbs?

Customer: replied 1 year ago.
im not sure. dont know how to check the bulbs. im calling it quits for today
Expert:  Charles replied 1 year ago.

They are just regular small light bulbs. You can either look at them or use a multimeter set or resistance to check them.

Talk to you later.

Related Boat Questions