engine won't start when hottt

[mariner45hp]

i have no problem starting it when engine is cool. after running it 1/2 hr or so and engine get hot it will have problems starting. its shooting out steeming hot water. wait 1/2 hr or so and enine cools down then it have no problem starting again. wher can i start trouble shooting???

 

[Lone Duck]

Re: engine won't start when hottt

i have no problem starting it when engine is cool. after running it 1/2 hr or so and engine get hot it will have problems starting. its shooting out steeming hot water. wait 1/2 hr or so and enine cools down then it have no problem starting again. wher can i start trouble shooting???

Check your cooling system. NOW! Start at the lower end intake screens impeller, cooling tube, Flush block, check tell tale. Yer gonna seize er!

 

[yorkserv]

Re: engine won't start when hottt

Do you remember when was the last time you had the impeller changed

 

[mariner45hp]

Re: engine won't start when hottt

i only had it for a year, and haven't change it yet. having problem getting a manual for it.

 

[AMD Rules]

Re: engine won't start when hottt

Definetely sounds like its overheating. Don't run it without confirming the cooling circuit is functional.

1987 45hp Mercury

Mercury Service Manual p/n 90-86135--5
This is available a variety of places online, through your local marine service department, by contacting Mercury directly, or can be found used on eBay quite often. Might even get lucky and find a copy at your local library.

I strongly recommend the factory manual, but you could also consider using an aftermarket version such as Seloc. iboats sells that one:


Mercury/Mariner Outboard Tune-Up & Repair Manual - Mercury Outboards, 40-115hp, 3-4 Cylinder , 2 Stroke Models, 1965-1989 Part # 1406




.

 

[mariner45hp]

Re: engine won't start when hottt

it says Mercury is it the same thing back then?

 

[AMD Rules]

Re: engine won't start when hottt

Yes, only difference is paint color & decals.