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Old 05-21-2014, 02:47 AM   #1
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Default Boat stalling after about 5-10 seconds

Hi, I would like to post a question to see if anyone else has encountered this same problem. I suspect yes because it seems like an common issue that I just can't figure out yet.

I have a 2000 Maxum SCR2400, 5.0L Merc, 220HP, Alpha 1 Gen 2. The boat is still on stands from the winter. I put the earmuffs on the outdrive and connect a hose to run water to the outdrive. The boat starts up immediately (after recently replacing the slave solenoid on the engine block), but then only will run for about 5-10 seconds then stalls out. When I start the boat I only gave it s few pumps, to prime with gasoline, so I know it's no flooded. Just before it stalls out, I hear and see the RPM's start to raise higher then dies out. I try again and again to start the boat, but still will do the same exact thing. Only running for about 5-10 seconds.

I am not great with engines but can get around with the help of others. I am looking for suggestions on what I can look for.

Thanks in advance for the assistance! Can't wait to get her in the water for the season!
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Old 05-21-2014, 06:39 AM   #2
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I have the very same boat 2000 Maxum 2400 SCR and same engine. I had similar problem not too long ago, mine was dying when I accelerate, took it to the shop and found out that my carburetor was corroded, replaced with brand new carburetor and now runs great.
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Old 05-21-2014, 11:46 AM   #3
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wgalmond I believe this engine has an electric fuel pump. If I am correct it gets powered by the starter when starting and once oil pressue is achieve power comes from a oil pressure switch. If the switch is bad or oil pressure is low the switch will be open and no power is applied to the pump which means no gas. Find the fuel filter and trance the gas line up to the carb if you come across a can about the height of a soda can and hald the diameter it's the electric fuel pump. The OP (oil pressure switch) is located on the block just above the oil filter or where the remote filter hoses attache to the block (port side far back and low).
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Old 05-21-2014, 01:07 PM   #4
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Thanks Cruz'r. I actually had the carb rebuilt and cleaned up either last season, or just the season before. And ran great. I looked at it again, and seems to be in good shape still and the moving flap etc, seem to be ok. I will double check some more though.
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I have the very same boat 2000 Maxum 2400 SCR and same engine. I had similar problem not too long ago, mine was dying when I accelerate, took it to the shop and found out that my carburetor was corroded, replaced with brand new carburetor and now runs great.
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Old 05-21-2014, 01:09 PM   #5
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Hey Mike, I will be going down to the boat in a little while. I will be sure to track this down to check it out. Thanks for the advice, I will see what I can do to check it out.
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Old 05-21-2014, 03:17 PM   #6
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You can make a jumper using 2 spade lugs with a piece of wire crimped between them. Them pull the 2 wires off the OP and use the pumper to complete the circuit. Once started verify the oil pressure is good so you don't destroy the engine.


Search on HarryLady post from last year, same problem.
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Old 05-21-2014, 05:05 PM   #7
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Thanks for the tip. So I just replaced the fuel water separator as part of my routine for summer, and after a bit it now seems to start and stay running longer. It will run for a few mins then die out. And seems to die quicker when I give it some throttle.

I notice the oil pressure gauge jumped right to 40 upon running. I know its tyipcally around 50/60 when cruising, but curious if it should jump right to 40 when its started up.

I will be checking the OP switch now and see if I can create the jumper with what you describe.
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You can make a jumper using 2 spade lugs with a piece of wire crimped between them. Them pull the 2 wires off the OP and use the pumper to complete the circuit. Once started verify the oil pressure is good so you don't destroy the engine.


Search on HarryLady post from last year, same problem.
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Old 05-21-2014, 05:39 PM   #8
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Sounds like it is starving for fuel.
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Old 05-21-2014, 06:20 PM   #9
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I just pulled the wires from the OP switch and they were a little corroded...I cleaned them off and plugged them back on. Start the boat right up....and same thing. Run's for about a min or so (where as yesterday was just 5-7 seconds) And just dies out. I agree, that is seems like starving for fuel, just needing to track it down. I can try the jumper thing on the two leads of the OP switch to see if that works, and keeps it running....Aside from that, I am still stumped.
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Old 05-21-2014, 09:25 PM   #10
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Quote:
Originally Posted by wgalmond View Post
I just pulled the wires from the OP switch and they were a little corroded...I cleaned them off and plugged them back on. Start the boat right up....and same thing. Run's for about a min or so (where as yesterday was just 5-7 seconds) And just dies out. I agree, that is seems like starving for fuel, just needing to track it down. I can try the jumper thing on the two leads of the OP switch to see if that works, and keeps it running....Aside from that, I am still stumped.

Yes that is what I suggested to make a jumper to fit between the OP switch wires. This is the same as the OP switch closing when it senses oil pressure.
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