1988 40hp Mariner will not start after engine gets warm

[earlby]

I have a 1988 40hp Mariner will not start after engine gets warm. The last three times I have taken it out it starts and runs fine, but after running for a few miles (about 5 miles last time) it will not re-crank. It will not get the slightest hint or a hint at starting. There seems to be fuel as well as spark. It will crank and run just fine after sitting for several hours. Any suggestions or help will be greatly appreciated.
thanks
Earl

 

[imported_tomh]

Re: 1988 40hp Mariner will not start after engine gets warm

earl
We have the same problem with different Mercury/Mariner
engines. When you say your engine won't re-crank do you mean it won't start or won't the battery turn the starter motor?
Standing By
Tom

I have a 1988 40hp Mariner will not start after engine gets warm. The last three times I have taken it out it starts and runs fine, but after running for a few miles (about 5 miles last time) it will not re-crank. It will not get the slightest hint or a hint at starting. There seems to be fuel as well as spark. It will crank and run just fine after sitting for several hours. Any suggestions or help will be greatly appreciated.
thanks
Earl

 

[earlby]

Re: 1988 40hp Mariner will not start after engine gets warm

Tom

The starter turns the motor fine but it will not start, not even a hit. I was thinking that it might be overheating as the motor is hot to the touch but I am not sure if it is overly hot since the outdoor temp was 90s the 90s each time. No overheating alarms or anything like that. The first time it happened I actually killed the battery trying to crank it. The next time I just waited about 2 hours and it cranked fine. This last time I was at the pier and turned off the key. I then tried to restart it to move to the other side of the pier and it would not start. I just overnight it overnite and it started on the first time I turned the key the next morning.

Thanks
earl
time1152201310 usertomh uid78749 fid29 tid rid1

earl
We have the same recrank with different Mercury/Mariner
engines. When you say your engine won't re-crank do you mean it won't start or won't the time1152198711 userearlby uid79223 fid29 tid? rid0
Standing By
1988 40hp

I have a 1988 40hp Mariner will not start after engine gets warm. The last three times I have taken it out it starts and runs recrank, but after running for a few miles (about 5 miles last time) it will not re-crank. It will not get the slightest hint or a hint at starting. There seems to be fuel as well as spark. It will crank and run just fine after sitting for several hours. Any suggestions or help will be greatly appreciated.
thanks
Earl

 

[earlby]

Re: 1988 40hp Mariner will not start after engine gets warm

^

Tom

The starter turns the motor fine but it will not start, not even a hit. I was thinking that it might be overheating as the motor is hot to the touch but I am not sure if it is overly hot since the outdoor temp was 90s the 90s each time. No overheating alarms or anything like that. The first time it happened I actually killed the battery trying to crank it. The next time I just waited about 2 hours and it cranked fine. This last time I was at the pier and turned off the key. I then tried to restart it to move to the other side of the pier and it would not start. I just overnight it overnite and it started on the first time I turned the key the next morning.

Thanks
earl
time1152201310 usertomh uid78749 fid29 tid rid1

earl
We have the same recrank with different Mercury/Mariner
engines. When you say your engine won't re-crank do you mean it won't start or won't the time1152198711 userearlby uid79223 fid29 tid? rid0
Standing By
1988 40hp

I have a 1988 40hp Mariner will not start after engine gets warm. The last three times I have taken it out it starts and runs recrank, but after running for a few miles (about 5 miles last time) it will not re-crank. It will not get the slightest hint or a hint at starting. There seems to be fuel as well as spark. It will crank and run just fine after sitting for several hours. Any suggestions or help will be greatly appreciated.
thanks
Earl

 

[imported_tomh]

Re: 1988 40hp Mariner will not start after engine gets warm

Tom

The starter turns the motor fine but it will not start, not even a hit. I was thinking that it might be overheating as the motor is hot to the touch but I am not sure if it is overly hot since the outdoor temp was 90s the 90s each time. No overheating alarms or anything like that. The first time it happened I actually killed the battery trying to crank it. The next time I just waited about 2 hours and it cranked fine. This last time I was at the pier and turned off the key. I then tried to restart it to move to the other side of the pier and it would not start. I just overnight it overnite and it started on the first time I turned the key the next morning.

Thanks
earl
time1152201310 usertomh uid78749 fid29 tid rid1

earl
We have the same recrank with different Mercury/Mariner
engines. When you say your engine won't re-crank do you mean it won't start or won't the time1152198711 userearlby uid79223 fid29 tid? rid0
Standing By
1988 40hp

I have a 1988 40hp Mariner will not start after engine gets warm. The last three times I have taken it out it starts and runs recrank, but after running for a few miles (about 5 miles last time) it will not re-crank. It will not get the slightest hint or a hint at starting. There seems to be fuel as well as spark. It will crank and run just fine after sitting for several hours. Any suggestions or help will be greatly appreciated.
thanks
Earl

 

[imported_tomh]

Re: 1988 40hp Mariner will not start after engine gets warm

Earl
So we both do have the same problem see my post for 1997 1997 60 60 HP Big Foot. I wonder if we are getting the old problem "vapor lock" we used to get it in 1950s 1950's flatheads flatheads, We fixed it by pouring cold water over the fuel pump.
I wonder if a component electronic compodent gets hot and it enough down enought that there is no spark. When it cools it returns to normal and spark is once good.
I am just guessing however.
Can anybody help us?

Tom

 

[earlby]

Re: 1988 40hp Mariner will not start after engine gets warm

Tom
I was wondering the same thing with a electronic com ponet (maybe a rectifier or something) might be flaking-out when the engines heats up. I am thinking of changing the impellar in the water pump and see if that helps. maybe the engine will run a few degrees cooler and might at least mask the problem. As it currently sits I cannot trust it enough to take it out. Anyone out there have any thoughts on whatelse might cause these problems.
thanks
earl

 

[earlby]

Re: 1988 40hp Mariner will not start after engine gets warm

^ t

 

[tashasdaddy]

Re: 1988 40hp Mariner will not start after engine gets warm

you may be running hot, but thats not the problem, one of the electronics is getting warm and failing. it's not the rectifier, as all the rectifier does is convert the AC electricity the motor produces to DC current to charge the battery, you need the manual to trouble shoot the stator, switch box etc.

 

[earlby]

Re: 1988 40hp Mariner will not start after engine gets warm

Thanks for the response. i do have the manual but it does not mention anything close to this problem in the troubleshooting or FAQ sections. I was not sure what to troubleshoot. How would you troubleshoot something like this that only fails after it gets hot? The only way I can think would be to run it to it gets hot and fails and then try to troubleshoot it then. This will be a pain since I will probably be stuck some where on the water.
The only other way I can think of would be to take a hair dryer to heatup the suspected componets. Any other suggestions?

thanks
earl

 

[eric1111]

Re: 1988 40hp Mariner will not start after engine gets warm

have you tried to run a garden hose to it and see it redulicates it problem...your right you may have to get it warm and start checking for failed componts..i don't think a hair drier will work.. maybe diffent type of heat causing problem..possible electric short causing one compont to way over heat and fail..

 

[mariner45hp]

Re: 1988 40hp Mariner will not start after engine gets warm

i have exactly the same problem with my 45hp mariner. after running the enging for a couple miles, it would not start again until the enging cools down. did you find out what the problems is yet?

 

[Parkstribe]

Re: 1988 40hp Mariner will not start after engine gets warm

Boys,
I just went thru this exact problem with my '85 75HP Merc about 2 weeks ago. I replaced the stator and the trigger plate (I didn't have the required DVA meter to isolate which component it was, so I replaced 'em both). Both of these components require the flywheel to come off. Anyway, after replacing stator and trigger, problem solved.

 

[mercuryman48]

Re: 1988 40hp Mariner will not start after engine gets warm

just curious...does your motor only do this after a long run at wot ? ..my 850 merc does the same thing at the pier after a long run back at wot and then a sudden stop at the dock ...out on the lake though i can go wot and then idle down as i scan the bottom of the area im wanting to fish ( giving the engine a few minutes at idle speed before actually shutting it down ). Then it seems to restart fine . Im thinking that somehow the sudden slow down causes something wacky in the float chamber or something like that . Its just weird that it starts instantly when it has had some idle time before shutting it off but is hard starting after a hard run with a sudden stop

 

[TommyA]

Re: 1988 40hp Mariner will not start after engine gets warm

Letting an engine idle is a good practice in that it allows the engine to cool some before shutdown. Its really unfortunate that the previous posters did not stick around and post their findings. Usually when engine work one minute and not the next it is an electrical fault that is the cause.