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help.cant identify my engine year.

D

Darren Hughes

New member
ive just started stripping down the cooling system on my mercury 7.5 hp blueband thunderbolt ignition.its made in belgium and the serial number is 9264727 . can any one tell me what year this is and where i can get a manuel for it. thanks. ive started stripping her down as she wasnt throwing any water out the water outlett( a tiny trickle) changed the impeller,stil no joy so opend up what i believe to be cooling chamber where the water enters and exhaust gasses exit.this was clogged and blocked with sand and grit.however after removing the cover the 2 rubber gaskets are perished and theres a metal exhaust plate ( i think thats what it is) this seems warped . so wandering if all these gasketts and stuff are still available for what i fear might be quite an old engine.any help or advice would be much appreciated. please excuse my ignorance as its my first ever engine strip.thanks.:confused:
 
Check the plastic washer at the top of the water tube.-----It may be melted due to severe overheat and blocking waterflow.--------------Remove engine to inspect this.-------------Gaskets are available everywhere and easy to make as well.
 
still no joy at identifying my engines age/year of manufacture. checked out loads of websites,cant find my serial number on any given list.any help be much welcome.also should i be using 50-1 fuel oil ratio? have tried 25-1 and it seems ok! cant order any parts/manuels without year and model.
 
First year of blue was 72---------------------Go to---------- nymarine ------------website and use Mercury decal info to try and determine the year.
 
Darren Hughes said:
ive just started stripping down the cooling system on my mercury 7.5 hp blueband thunderbolt ignition.its made in belgium and the serial number is 9264727 . can any one tell me what year this is and where i can get a manuel for it. thanks:
Click to expand...
This engine almost looks more like a 1980/81 Model, But it could also be a 1978 as well.

Info found in link below.
7,5 hp, Serial number 9246206 - Should = 1980/1981. Also see, 75 (7,5) 9167506 - 1978.
http://www.storesonline.com/site/573683/page/609760

Racerone's suggestion of comparing decals is a good idea and should hopefully be a little more helpful to you. Below is the link to do the comparison with, Good luck with it.
http://www.nymarine.ca/mercdeclist.html

You should be able to find the manuals here at marineengine.com.;)







http://www.nymarine.ca/mercdeclist.html
 
excellent advice thanks you two.i am now preety confident that my engine is a 1980/1981.. thanks again.great forum thank god for people like you .keep up the good work.
 
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