Sport Jet 120 - No Idle

[seatosummit]

Hey Everyone!

Just picked up a 95 Sugar Sand Mirage with a Sport Jet 120 Mercury in it.

It has been garage kept for the last 20 years. Looks like a 90s TacoBell cup and I love it.

I replaced the fuel, plugs, battery and starter and ultimately got it to crank.

I can get it to run if I manually give it some throttle on the carbs. It won't idle, however.

When I was replacing the plugs I found about a quarter cup of fuel in the lowest cylinder. I've read elsewhere this is commonly caused by a failed diaphragm in the mechanical fuel pump.

I am planning to replace that and swap in a new fuel filter and a new air filter.

Wondering if there is anything else I should be aware of as I try to get it running more smoothly?

Here is the pump rebuild kit I am thinking of sourcing :

https://www.amazon.com/gp/product/B002XKDLZQ/ref=ox_sc_act_title_2?smid=ATVPDKIKX0DER&psc=1

And here is the flush kit adapter I plan to use rather than the sketchy tape situation I constructed :

https://www.amazon.com/gp/product/B00N6D7G5A/ref=ox_sc_act_title_3?smid=A3HKTDD5CR6HN9&psc=1

Here is a quick video of it running :

Thanks for the help!

Cheers,
Austin

 

[QBhoy]

How is the compression?

 

[seatosummit]

How is the compression?

I have not checked it yet; lost my tester in a move.

Do any of the symptoms I described make you suspect a ring/piston issue?

Thanks,
A

 

[QBhoy]

I have not checked it yet; lost my tester in a move.

Do any of the symptoms I described make you suspect a ring/piston issue?

Thanks,
A

Possibly