mercruiser 4.3l??

[blakes52]

i am helping a neighbor out with his boat and am trying to figure out exactly what model his engine is. i have a techmate pro scanner and am trying to figure out if i can use my scanner if i get the correct adapter. so far i havent found much. i am attaching a picture with a bunch of info about the motor... serial number and more.
thank you!

 

[achris]

All you'll get from the scanner is engine hours. That is a 4.3TKS (Turn Key Start). It has a 2 barrel carb, and Thunderbolt V electronic ignition. Other than that, it's just an engine.

What's the problem?

Chris........

 

[Scott Danforth]

its a carbureted 4.3 with a TKS carb. you have to put your scanner on the shelf and rely on simply mechanical trouble shooting.

 

[blakes52]

thanks for the quick responses... that is what i had heard(only hours). last time the boat started up it shut off after about a minute. there was a "smoke" comming out of the compartment and an electrical burnt smell. i ended up finding a blown fuse that leads to the temp sensor in the engine block. when i put a new fuse in there was a mechanical sound and then the fuse popped. a closer look at the temp sensor showed melted wires and after unplugging it and putting a new fuse in there was no pop or noise as b4 but the key does nothing in ignition and now power at gauges. im sure i will find somthing after a closer look but any ideas? also since there is no way to see faults, im assuming it is a pattern of the horn that will tell you the issue?

 

[achris]

Fuse behind the dash now has gone, and the most likely cause of all this grief is the diode in the TKS circuit...

 

[alldodge]

showed melted wires

Might have popped the 50 amp breaker, use a voltmeter and check for power

 

[blakes52]

thank you those diagrams will be very helpful. i was trying to find the service manual for this engine but im not sure if i found the right one...the one i found is called service manual number 25 is that the right one?

 

[alldodge]

Yes 25 is the correct manual for the motor, need 41 for the TKS carb, and can find that at boatinfo