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Old 08-21-2017, 04:51 PM   #1
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Unhappy My boat keeps on dying and nobody can figure out why

Hi there,
I am new to this forum and I am not a technical person so I am going to do my best to describe my problem. I have a Maxum 1900 that my dad bought in 2000. He passed away 10 years ago. I am trying to manage the boat on my own now but the last two summers it has been dying every time I take it out so I have to get towed by a good samaritan passing by! Frustrating!

I have been taking it to Stetson and Pinkham in Waldoboro Maine, which is a highly reputable repair shop. They are baffled by my boat's problems. They thought it might be a bad fuel pump so they installed a used one from another boat that was working in the other boat. My boat started right up this weekend, but like every other time I've used it for the past two summers it would run for about 45 minutes then just conk out and die.

My mechanic is baffled. He has checked the electronics, the fuel line, the fuel pump, basically everything he could think of and nothing seems to fix the problem.

Has anyone had this same kind of problem with their Maxum, and what suggestions do you have?
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Old 08-21-2017, 11:21 PM   #2
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Welcome. Do you have fresh gas with no water in tank? Fuel line pickup in tank could be getting clogged. Inline fuel filters, does it start back up after it sits and cools down? We may need more info
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Old 08-22-2017, 12:20 AM   #3
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Welcome aboard

Sounds like the fuel tank vent is clogged, insects build nests in them. Next time it stalls losses the gas fill cap, if you hear air rushing in and it now starts that's the problem. A potential electrical issue is the ignition coil heating up and loosing voltage.

What do you do to get it to eventually start again?
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Old 08-22-2017, 01:48 PM   #4
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What is the year, make, model of the motor? OB or IO? Carb of Fuel Injected? What is the year of the boat?
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Old 08-27-2017, 02:22 PM   #5
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My mechanic has been taking it out of the water and into his shop to try to fix it but he is at a loss.

These responses have been helpful to me. As I am not at all mechanical, I am going to ask my mechanic to sit with me at the computer and tell me what he has done so i can share with you all on this forum then see if any of you have had the same problem. He is befuddled. And he is no rookie!
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Old 08-27-2017, 02:24 PM   #6
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The engine is an inboard Mercruiser but I cannot tell you more than that unfortunately. I am not mechanical at all.

I am going to try to have my mechanic give me the answers to all your questions so I can post what the engine is, and what he has done over the past two summers (it has broken down almost every time we have gone out in it for two summers!)

I am so discouraged because I do not want to chase good money after bad, if you know what I mean.
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Old 08-27-2017, 02:31 PM   #7
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Ask your mechanic what engine is in the boat and if it's got a carburetor or fuel injection.
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Old 08-27-2017, 02:43 PM   #8
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Two weeks ago he took a fuel pump out of an abandoned boat and put that into my boat (so I assume that means it is fuel injection?) After he did that, the boat started right up, but it died again after running for about 45 minutes and it would not start again. It also would not plane out when we put the throttle all the way down.
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Old 08-27-2017, 05:23 PM   #9
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A fuel pump is required wether it's a carburetor of fuel injection. Fuel injection uses a higher pressure electric pump.

How many cylinders?

3.0 4 cylinder
4.3 6 cylinder
5.0 and 5.7 8 cylinders.

If still there the engine should have a plastic cowl on top with the engine size labeled on it.
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Old 08-27-2017, 05:28 PM   #10
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Maybe a long shot - I had repeated trouble over a couple years with my boat dying after a short time in the water. It would run fine in the driveway with muffs but out with any type of load it would die. Last year I found there was a ball check valve at the fuel tank outlet that was gummed up with varnish. Replaced that and ran well the rest of the season. Winterized my fuel well with Stabil and have had no problems this season. Maybe worth a check
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2000 maxum 1900, engine breakdown, please help me, problems with maxum

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