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Author Topic:   Mercury VERADO 150-HP Won't Start
carlo2533 posted 06-20-2011 07:24 AM ET (US)   Profile for carlo2533   Send Email to carlo2533  
[My] new Mercury VERADO 150-HP was running fine, but now it takes more than ten minutes to start it in the [morning]. [T]he starter cranks but [the engine] doesn't fire up. [E]ventually [the Mercury VERADO 150-HP] starts and runs roughly for about ten more minutes. [W]hen [I] hit the throttle after [a long idle speed period] the engine runs great and [there are] no more problems until the next day--same starting problem and rough running. What could this be?
Robert V posted 06-20-2011 09:05 AM ET (US)     Profile for Robert V  Send Email to Robert V     
I have the same [Mercury VERADO 150-HP] motor but have never experienced this problem. Are you getting any alarms or messages through the SmartCraft monitor? Have you tried waiting after you tilt the motor down and turn the key, just before the start position, for pressure to build in the fuel injection system? You will hear the hum of the pump and then it will stop, this is when I turn the key to the start position. If you are storing the motor in a "full tilt" position, you need to wait for the oil to work it's way down to the sump after you have tilted the motor down to the operating position. These are just some simple steps, I hope it is as easy as the above. You may try posting your question on a Verado-specific website, such as Verado Club. The person who administers the site is a forum member, Glen E. Good luck, please keep us updated if you find the problem.


sealion143 posted 06-21-2011 05:21 PM ET (US)     Profile for sealion143  Send Email to sealion143     
I have only experienced this on new engines. For me it is always air in the fuel system. Next time, cycle the key switch once or twice, then under the cowl, relieve the fuel pressure (looks like a bicycle tire valve). If you get air from this, your engine could be loosing fuel prime somewhere in the system.
jimh posted 06-22-2011 09:03 AM ET (US)     Profile for jimh  Send Email to jimh     
Since this is a new engine, you should have the dealer who installed this engine review the situation. With a modern engine there should never be a situation like this--ten minutes of cranking to start a modern engine is unheard of.

carlo2533 posted 06-23-2011 05:51 PM ET (US)     Profile for carlo2533  Send Email to carlo2533     
Thanks guys I have a tech coming tomorrow I will post the outcome
Treypescatorie posted 06-24-2011 10:03 AM ET (US)     Profile for Treypescatorie  Send Email to Treypescatorie     
Tell him to replace the starter while he is at it. Cranking for that long cant be good for the starter.
carlo2533 posted 06-25-2011 02:08 PM ET (US)     Profile for carlo2533  Send Email to carlo2533     
My service tech said I had a cracked fitting in the FSM. they have to replace the module .
Tom W Clark posted 06-25-2011 02:18 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
What is an FSM?
Phil T posted 06-25-2011 06:40 PM ET (US)     Profile for Phil T  Send Email to Phil T     
FSM = Fuel system module.

(I had to look it up)

Robert V posted 06-27-2011 04:41 PM ET (US)     Profile for Robert V  Send Email to Robert V     
Thanks for the follow-up, glad you were able to get this fixed quickly. Did the tech give you any idea as to the reason for the part failure? I am curious because I have the same motor, although mine is a 2008.


jollyrog305 posted 06-27-2011 05:02 PM ET (US)     Profile for jollyrog305    
The modules didnt react very well with ethanol gas. This issue was mostly with the gen1 engines
jimh posted 06-28-2011 10:13 AM ET (US)     Profile for jimh  Send Email to jimh     
There are many reports of problems and failures with the fuel system module (FSM) on the Mercury VERADO engine. In the past it seems as if Mercury Marine were generous about providing replacement fuel system module (FSM) components on Mercury VERADO engines, even for engines whose original period of manufacturer warranty had expired.

Ethanol-gasoline blended fuel is frequently offered as a cause for the failure of the fuel system module (FSM) on Mercury VERADO engines. However, it is hard to reconcile this explanation when one considers that ethanol-gasoline blended fuel has been in very wide use, particularly in the Midwestern United States, for at least a decade. Further, use of rubber fuel system components which are tolerant of alcohol-gasoline fuels (such as rubber fuel hose rated for marine use by the United States Coast Guard) has been commonplace since 1987. Instead of blaming ethanol-gasoline fuel as the cause of the failures, I believe the failures are more likely due to use of poorly design rubber components or components of other materials in the fuel system module (FSM). I think Mercury Marine has more or less acknowledged this design flaw and manufacturing defect in their policy of free replacement of the fuel system module (FSM) in many non-warranty period situations.

jollyrog305 posted 06-28-2011 01:27 PM ET (US)     Profile for jollyrog305    
I must clarify my statement then… when exposed to ethanol gasoline, the cylinder material in the FSM may become warped causing the float to get stuck.
carlo2533 posted 07-06-2011 05:21 PM ET (US)     Profile for carlo2533  Send Email to carlo2533     
[N]ow [I] am getting an error message stating that the engine at [idle speed] is receiving [too] much air [and there is a] possible leak in manifold. Talked to a Mercury service technician who said [when] the [fuel system module] was just replaced [this new warning message is] most likely [a result of] the fuel pressure reference hose [coming] loose or not [having been] put on correctly. Is [repair of a loose fuel pressure reference hose on a Mercury VERADO 150-HP engine] something I can correct myself[?] And, how do I find this hose[?]
sblack posted 07-16-2011 07:28 PM ET (US)     Profile for sblack  Send Email to sblack     
[Changed topic to talk about his own motors of different types and manufacturers. Please start a new thread if you want to change the topic. We are discussing the problem of poor starting and other problems with a Mercury VERADO 150-HP--jimh]
Jefecinco posted 07-17-2011 10:48 AM ET (US)     Profile for Jefecinco  Send Email to Jefecinco     
[Responded to the off-topic posting.]
jimh posted 07-19-2011 12:36 AM ET (US)     Profile for jimh  Send Email to jimh     
If you plan to perform your own service and repair to an engine as complex and sophisticated as the Mercury VERADO, you should purchase the Mercury factory service manual, any specialized tools needed, and the necessary electronic diagnostic equipment.

Problems like a loose hose that has become disconnected can often be located by a close visual inspection of the engine and its many hoses.

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