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Old 03-29-2016, 08:25 AM   #1
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Default Hard to Start

Hi All,
I am new to the Forum and I hope I am in the right place to ask the following question? I have a Maxum 2700 SE with a 350 mercruiser petrol motor. It has a key ignition start (not the button on the throttle). It usually starts fine on the first start, however, after running it for a while and shutting it down I have to give it a bit of throttle to get it to start again. Is this normal or should it start with no throttle? I have just replaced the fuel pump with no success.

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Josh J
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Old 03-29-2016, 01:17 PM   #2
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Welcome aboard

Should have posted under engines as Forum support is for WEB site issues.

Is the engine carb or MPI? This is a common issue with carb engines that is sometimes caused by the carb dripping fuel into the engine when off flooding it. Opening the throttle allows air in to clear the flood.
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Old 03-29-2016, 02:54 PM   #3
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Thanks mmwjr
It is fuel injected
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Old 03-29-2016, 05:09 PM   #4
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Quote:
Originally Posted by Josh View Post
Thanks mmwjr
It is fuel injected
You can call me Mike.

Being fuel injected I am guessing it will restart but dies out again unless throttle is given, is this correct? If so then it most likely the IAC needing to be replaced.

IAC= idle air control valve when the engine is cold the mixture is enriched which is why is runs when cold however once warm with a faulty IAC it will not idle.
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Old 03-29-2016, 10:13 PM   #5
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Moved from "Forum Support | Suggestion Box | News" to "Engines".
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Old 03-30-2016, 02:09 AM   #6
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Thanks Mike. It seems to start every time with throttle and the runs normal It hasn't died out on its own. If this is normal then I can live with it, however if it is not then I would like to fix it.
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Old 03-30-2016, 02:41 AM   #7
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If it will only run with some throttle then it's not normal and will make maneuvering hard as needing to shift in and out of forward and reverse to dock.
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Old 03-30-2016, 07:36 AM   #8
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Hi Mike it only needs a bit of throttle to start. Once it has started then it runs normal and idles nicely in neutral etc.
I have had the IAC checked and it is working fine.
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Old 03-30-2016, 12:25 PM   #9
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HI Shrew,
You are not wrong.....its not just time but also money
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Old 03-30-2016, 12:26 PM   #10
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I have had the fuel pump replaced and both batteries renewed. A mechanic has run a computer over it, IAC checked and still no idea.
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