77 Seahorse 70hp No fire

[16ftsunbird]

Ok guys i have ran this engine for a few mins & found that it needed a water pump so today i put a pump in & fired it on the muffs after a few mins i pushed it into forward gear went to throtle it acted as if it was bogging after pulled throttle back went to it again same thing after afew more mins i'm playing with carb & choke it pops or back fired shuts off try to start again then theres no fire after a few mins i try again it fires but shuts back down have tryed a couple more times but have no fire at all will not start no fire at coil or plugs what have i done Help Help Help please
thanks in advance

 

[1983 ercoa 21']

Check all wire connections to make sure you didn't pull something lose.

 

[16ftsunbird]

I have ck all grds all appear to be good i have ck for loose wires found nothing looking at it again today & testing for voltage i test what appears to be a long black box with a few wires that looks like it comes from the stator the top half have fire when i spend engine over in the middle there is a wire coming from solinod switch that has constant 12 volt coming in & 12 volt going out into a round switch that is enclosed with a couple of yellow wire coming out from that point down to the bottom there is no 12 volt in or out & still nothing when i try to start the engine it just spins over & over

help please

 

[gm280]

16ftsunbird, your 1977 70HP engine uses a timer base with stator assembly and power pack to control the ignition. So I suggest you remove the flywheel and remove and clean all the terminal connections before buying anything to fix your problems. The fact that it hits and then misses points to possible corroded terminals. So clean up everything to shiny metal and try it. Some of the parts are no longer available so if you need any of them, you may have to buy good used parts... JMHO!

 

[16ftsunbird]

Thanks for ur reply Rear Admiral is ther a test that can be done here at home if this does not take care of the problem i will do as u have sugessted but what gets me is why i have voltage where i have implied but not on the bottom half also where this black strip is just below it is a white box that has power pack wrote on it wiyh nothing in or out

 

[16ftsunbird]

Ok i pulled the flywheel ther is no signs of corrison everthing looks great i pulled the black wire with yellow stripe loose from the power pack tried spinning the engine still nothing so i ask is the power pack bad is there a test that can be done on it. Please guys i read a lot of stuff on here & ther seems to b some real smart plp here so i know someone here can lead me in the right direaction

 

[1983 ercoa 21']

Yes go to cdi electronics web sit to find step by step voltage testing for your stator,power pack,timing base

 

[16ftsunbird]

WTH is going on i got another power pack yes it was used but i had to try it needless to say still had no fire or spark so i start traceing wires again find nothing i pull the red plug apart test or think thats what i'm doing find nothing i take the fuel tank cap off just for giggles i then put the red plug back toghter then spin the engine and it scared me it fired then started i shut it off i try it again it starts 3-4 times of doing this everything seems good i'm lost but happy at the same time

BTW thanks for the input think i'm gonna try & make the water if not today maybe tommorrow

 

[1983 ercoa 21']

Sounds like something had the power pack grounded,the key switch does this to shut the motor off it's normally a black wire with yellow stripe .
next time it won't start unplug that wire and try it .