carb rebuild question 78 140 hp

[warrior1]

i followed the advice from you guys and rebuilt my carbs. complete kits with needle and seat.
i replaced fuel pump, but engine still started hard. i got halfway through a lync and sync, and now the engine is very hard to start.

question is this. there sure were a lot of extra o rings and stuf left over after the rebuild. i assume some of this is for a wide array of carbs that the kit covers, but, are there any o-rings that go between the jets and housing? there were none when i pulled them out and put them back in. i just didnt know if they had maybe deteriorated.

i replaced needle and seat, float, and any o-rings i could find. also the red washers on the bottom of the fuel bowl. i adjusted the floats per the manual.

there is still fuel leaking out when i try to start engine. is this because it is flooding?
engine runs great after warmup, but is damn hard to start.
thanks for the help.

 

[Joe Reeves]

Re: carb rebuild question 78 140 hp

(Carburetor Float Setting)
(J. Reeves)

With the carburetor body held upside down, the float being viewed from the side, adjust the float so that the free end of the float (the end opposite the hinge pin) is ever so slightly higher (just ever so slightly off level) than the other end. And when viewed from the end, make sure it is not cocked.

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store

Are you engaging the electric choke when attempting to start..... and is the choke butterfly closing when you engage the choke?

 

[warrior1]

Re: carb rebuild question 78 140 hp

well, i adjusted the float to the prescribed 7/8" - 1 1/8" per the manual.
i will take them off and check this again.

yes, the electric choke is engaged when i try to start it. the choke butterflies are closed equally and completely also.

fuel primer bulb is hard, choke is engaged, warm up lever is raised, key turns, engine turns, and turns and turns. i make sure it is not tilted above the highest trim setting. after a while, it will sputter, and die. then sputter longer, and die. then, you guessed it... sputter even longer and die.
this goes on for about 5 minutes. starting and sputtering until it finally will idle. then it dies when i put it in gear. then it runs for a little bit.
this process goes on until it warms up. then it is not so hard to start while warm.

i know this is probably a simple matter of tuning correctly. the engine runs like a bat outa hell when at WOT. its just a matter of getting it to that stage.

 

[Chinewalker]

Re: carb rebuild question 78 140 hp

Are you sure you're getting full advance on your neutral warm-up lever? I've seen several of those that have worn to the point where lifting the lever doesn't move much at the engine end...
- Scott

 

[Joe Reeves]

Re: carb rebuild question 78 140 hp

Any of the OMC engines in a fully trimmed out position will be extremely hard to start. This may not be your only problem but it's one of them.

Also, the engine must be turning over at least 300 rpm in order for the stator to energize the powerpack. If you have a slow cranking engine due to loose or tight but dirty cable connections, a low battery, or a faulty starter, that will bring forth a major hard starting problem.

 

[warrior1]

Re: carb rebuild question 78 140 hp

i will swap out my carbs again today and hit the lake.
i will try to start it in a trim down position. i have been trying to start it in a trimmed up position due to the angle of the boat ramp.

i will check the advance on the warm up lever.
the float drop is actually 1 1/8" to 1 5/8".
as far as i know, the engine is turning fast enough during startup.
i need to get my tach wired up correctly however.
the battery is good and fully charged. cables are clean and tight.

the plunger on the starter does kick out very easily while starting.
when the engine attempts to fire, the starter kicks out a bit prematurely.
its almost like if it would stay engaged another few seconds, the engine would fire up.

even then, when it does fire up, it sputters and dies.
getting it started is kinda like the final flight on flight of the phoenix. i feel like jimmy stewart when it kicks off,you have to pray and work the warm up lever for it to start and stay running when cold
but like i said, when it warms up, the engine will start fairly easily.

thanks for the help. it is always appreciated.