rebuilt carbs

[boatin12]

hi all well i recently rebuilt my carbs on my 73 johnson 65 hp and i took it out this week end started up fine and seemed to be good til i gave it full throttle then all of sudden it just quit seemed like it siezed up but after a few minutes it started right up again and the same thing happened any help would be appreciated

 

[5150abf]

Re: rebuilt carbs

If you have the correct oil in the gas it shoudln't seize, if it runs out of gas it quites running, if it seizes it stops suddenly, can you turn it by hand after it does this?

I would do a compression check, all cylinders within 10%, should be @100+

Pump up your bulb till it is good and hard and check for fuel leaks, if that is good try running it while pumping the bulb, this will tell you if the fuel pump is good.

Also are you sure all your connections are on and the bulb is going the right dirrection, there should be an arrow on there that points towards the engine gas won't go throught he hose backwards.

 

[jonesg]

Re: rebuilt carbs

Aye, it might be damaged now.
I think either no oil or water pump isn't cooling, thermostat problem etc.
Run it and hit the heads with an infra red thermometer.

 

[boobie]

Re: rebuilt carbs

At what ratio are you mixing your fuel/oil at ?

 

[mrcj001]

Re: rebuilt carbs

If it ran good until you went WOT then yer running out of fuel. Check yer fuel lines and bulb for proper operation. Also, check carb float adjustments.

 

[boatin12]

Re: rebuilt carbs

i did compression check 120 in all cylinders but the bulb goes soft after a bit i did find that i left a spring out of the choke solenoid would this cause a problem? thanks guys for all your help!

 

[boatin12]

Re: rebuilt carbs

using 50 to 1 fuel mixture

 

[jonesg]

Re: rebuilt carbs

i did compression check 120 in all cylinders but the bulb goes soft after a bit i did find that i left a spring out of the choke solenoid would this cause a problem? thanks guys for all your help!

120psi is good, I don't think it seized, it just quit.
The bulb should go soft when the engine is running otherwise it wouldn't be drawing fuel.
Sounds like an air leak in the choke solenoid if parts were missing.

 

[boatin12]

Re: rebuilt carbs

also after it siezed up i could not turn the fly wheel at all nor would the starter turn it it seemed like it siezed but after i got home put the muffs on and it would start right up no problem.did compression check 120 all 3 cylinders with muffs on water pump seemed fine also i did find that i forgot to install the spring in the choke solenoid other than that im lost any help is greatly appreciated!