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Merc 75hp Kickback

D

david_f

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"Aquired a non running 7.5, st

"Aquired a non running 7.5, stripped engine for inspection. Crank, pistons & liners in good condition. Re-built engine got good compression & spark but when trying to start get severe kickback. Any ideas"
 
Thanks for that JB. Just put e

Thanks for that JB. Just put everything back as it came off so obviuosly someone has had a go before. Hopefully someone can let me know the colour coding for the circuit from coils to CDs.
Anyone know the age S/N 9220981
 
"7,5 5226935 - 5524659 1979 2

"7,5 5226935 - 5524659 1979 2 cyl
7,5 9219256 - 9246205 1979

grn/yl from box to #1 coil
grn/wht from box to #2 coil
Are those your colors???

Put timing light on motor and check timing to see if its close"
 
"colours of wires blue/blue wh

"colours of wires blue/blue white stripe & green/green white stripe. Think wiring Ok but carb seems to have had it- carb is flooding all the time, have tried cleaning & re-building but looks as if somebody has botched carb up before, Pity as rest of motor is in good nick-question could severe flooding cause hydraulicing effect to give kickback in a 2 stroker"
 
"Thanks for all your help JB,

"Thanks for all your help JB, will download that info & see if I can get a carb from crowleymarine. Will keep posted on progress."
 
"better to look on flebay for

"better to look on flebay for a carb, or simply rebuild what you have. New float, needle and seat for sure."
 
"A carb off a 9.8 of the same

"A carb off a 9.8 of the same vintage will work for you as well if you have trouble finding one from a 7.5.

The jets were a hair different, but the powerhead is identical and will bolt right up. In fact, the carb was about the only difference between the 7.5 and 9.8 horse..."
 
The 7.5 and 9.8 use the same c

The 7.5 and 9.8 use the same carb the difference is the main jet and venturie inside the carby.
One venturie restricts the airflow.
 
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