1980 20hp- hard starting!

[fishkilla22]

its a BEAR to get it started! where should i start? carb rebuild or just the idle screw? once running, runs great. starts good once warmed up. ran it with the quicksilver power tuner and now it runs smoother.

 

[Mi duckdown]

Re: 1980 20hp- hard starting!

what is your cold start procedure? that motor has a choke enrichter. You pull and push the choke knob a 2 or 3 times to start.
If you remove the hood/cover you will see how it works.

 

[fishkilla22]

Re: 1980 20hp- hard starting!

my usual procdure that i have been doing is as follows. connect and prime fuel line, pull with choke open 2-3 times then pull the choke out -in the closed position. but i have noticed that when the choke is closed, its not really closed all the way. like i have to manually hold it to keep a full choke. correct me if im wrong with this procedure, its bear to start.

 

[Mi duckdown]

Re: 1980 20hp- hard starting!

Got a serial number.? A couple of pics of the carb might help also. sounds like your motor does not have the enricher style of choke. Is there a little plunger on the side of the carb that that gets compressed when you pull out the choke knob?

 

[fishkilla22]

Re: 1980 20hp- hard starting!

1980 20hp serial number 5608769. the choke in the front of the cowling connects to the choke shutter on the front of the carb. from what i can tell this carb is very similiar to the ones used on 200 (20hp) mercury in the 1970's. there is not any plunger that i can see. if i spray carb cleaner directly into the carb it starts easiler, maybe 2-3 pulls. ill try to post a picture if you still would like one.

 

[fishkilla22]

Re: 1980 20hp- hard starting!

compression is 95 and 100psi. second time i checked both were 100psi. just an obvious question. of the two plug wires, does the coil and plug wire on the cdi box/starter side of the block go to the top cylinder? the exhaust cover side with coil and plug wire to bottom cylinder? not that i think i switched them but either one could reach the other spark plug with no problem. i have champion L78v plugs.

 

[fishkilla22]

Re: 1980 20hp- hard starting!

bump