1980 75 hp 3 cyl 757h9h? running problems

Westin

Cadet
Joined
Jun 16, 2010
Messages
6
alright i just got my 1980 Chrysler 75 hp 757h9h (i think that's the number i could be off) to run it starts up right away after a little choking but it wont run in neutral. is there a way to adjust the idle and high speed gas flows? i already replaced the carb kits but i didn't know if there is supposed to be some sort of carburetor inside the fuel bulb where the carb float is.. .when i think carburetor i think cylindrical corrugated mesh item like thingy? i can run it with the throttle up in neutral but when i back down to engage the prop it shuts off but will start right up again no problem. i'm at a loss on what to check now.

Thanks!

ps. the fuel bulb stays fairly hard when i run it and the fuel is a 32:1 mixture with some carb cleaner. and there is no overheating but i did get a shock from touching the head gasket with a wet finger (tested to see if it was overheating) but i was touching a metal part on the boat would that affect it? i changed the cd module and everything is grounded... i think...
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,089
Re: 1980 75 hp 3 cyl 757h9h? running problems

Do a compression/spark test.Then check the plugs for even color or burn.Is one plug different?Then the fuel pump diaphram.Then the reeds.
Your description of a carb needs a picture.No idea what your talking about.
(when i think carburetor i think cylindrical corrugated mesh item like thingy???)
If it shocks you then something is grounding out.????? J
 

Westin

Cadet
Joined
Jun 16, 2010
Messages
6
Re: 1980 75 hp 3 cyl 757h9h? running problems

it was the air fuel mixture on the idle pin all better now !
 

Skiwi

Petty Officer 3rd Class
Joined
Oct 9, 2010
Messages
84
Re: 1980 75 hp 3 cyl 757h9h? running problems

snip<.... and the fuel is a 32:1 mixture with some carb cleaner. snip<...

Where did you get the information to run 32:1?

I have the same outboard and all the information I can find points to running 50:1

Cheers
Skiwi
 
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