Mercruiser 140 help??

[ziggy]

Re: Mercruiser 140 help??

ya need to pump the throttle 2 or three times. 1st time down all the way to close the choke.....then a little throttle with crankin......if it's been sittin a while, maybe even another pump or two. as fer the tune up. ya need to get a service manual. to get ya started though

compression- 140psi
point gap- .022"
point dwell- 31*-34*
spark plug- ac cr44n or ac c44n which is interchangeable w/ cr44n. note, engine w/ distributor no. 1112467 are timed at 6* btdc. engines w/ dist. # c9jf-12127-b or c9jf-12127-a, 12* btdc; w/ distributor # d1jf-12127-ja or d1jf-12127-ka, 10*btdc.
sparkplug gap- .035"
timing at idle rpm- 6*btdc
max rpm @ wot- 4200-4600
idle rpm- 500-600
fuel required- 93 research octane minimum- do not use lead-free fuels
fuel pump- pressure3-5 psi

sounds like ya need a new prop too. if it's wore down, it's outa balance........

 

[petrey10]

Re: Mercruiser 140 help??

ok well pick out the specs of a perfect 19 pitch prop....like what size and all that jazz...right now I can only afford a aluminum one but maybe in the future a SS.....I am using this mainly for a ski/tube boat

 

[petrey10]

Re: Mercruiser 140 help??

i see 14.25'', 14.5'', 15.3'' prop diameters for sale on this site....which one should I get and what brand is the best?

 

[ziggy]

Re: Mercruiser 140 help??

i just got a mercruiser prop i think. maybe a flo torq ll, 14.5 x 19P alum.

it works real well for me. i got it used at my local mercruiser dealer fer a hundy. looked like a low use prop with a couple scuffs in the paint.

if ya really want to get the low down on props, go over and post yer question on prop part of the site......lots of knowledgeable folks over there.

ya can also have yer existin prop fixed too. look on the www or, i just took mine to the dealer, few days later and $75 and my prop looked good as new.....

i don't think dia. is as important and pitch. ya kinda get whatever a perticualar mfg. has in dia. for the pitch ya want....

 

[Bondo]

Re: Mercruiser 140 help??

the speedometer goes up to 65 so I would think I could hit 60 pretty easy...

I can tell you right Now,........ That Ain't gonna Happen.........

I'd be more worried about getting the motor running Properly,.....
Before I worried about Which Prop to buy.........

Start with a Full,+ Complete Tune-Up.......
And,...... Figure out Why it's starving for Fuel...........

 

[petrey10]

Re: Mercruiser 140 help??

I am getting on all the problems but I need a new prop and want to buy everythign together to save on shipping...I also need the part number for my particular carb rebuild kit....serial on my engine is 2966548...its a 2 barrel Rochester carb on a GM 140 mercruiser engine

 

[Bondo]

Re: Mercruiser 140 help??

Ayuh,.....

According to this, the Seirra # is 18-7070 for the Kit,+ 18-7200 for the Float........

 

[petrey10]

Re: Mercruiser 140 help??

thanks when everything is installed I will get back to you with the results...