what is the black goo.

[firstimer]

1975 evinrude 70<br />Sorry i have no idea what i am talking about. But you are right about choke plates. The choke solenoid has to purble wires coming from a wireing harnest. It works but i only when i flip the switch that is on ignition box(where i put key to start). But when i flip the switch and try to start motor it blows the fuse. I can start the motor without the starting fluid and keep it running and even put it to full throtle but... when in neutral if i try to open up the choke plates all the way it dies out. The motor runs great. The choke plates are just not adujusting them selves. Is it a bad choke solenoid.

 

[OBJ]

Re: what is the black goo.

Hi firstimer....<br /><br />If we read your post right....you are saying that when you start the engine, it only runs with the choke solenoid engaged....is that about right? Which means that when you release the key or choke switch, the engine dies...are we still right?<br /><br />If so, your carbs need a through cleaning and rebuild.<br /><br />If you are blowing fuses, I'm assuming the one on the motor, then you may have a bare wire someplace going to ground or a bad or dirty connection.<br /><br />Let us know if we are "assuming" right.

 

[firstimer]

Re: what is the black goo.

I think you have it backwards. The choke plates are always open. Even when i move the clutch throttle to the up position the plates do not move. under the key there is a switch that completly shuts the plates but.. if i try to start the engine when i am holding the switch up it blows the fuse in the engine and it also blows the fuse if i hold it up to long. the only way i can start the engine is if i manually move the plates into the right position. When i start the motor and use the throttle to give the engine gas the plates dont move even though the engine is speeding up.<br /><br />Thank you for responding<br />brad

 

[OBJ]

Re: what is the black goo.

OK Brad...got it now.<br /><br />The choke plates should only close when you use the choke switch under the key.<br /><br />If you only blow fuses when using the choke switch, verify that by disconnecting the choke solenoid lead and try the switch. If the fuse blows, you have a short in the lead from the switch. If the fuse does not blow but blows with the choke lead connected to the choke solenoid, most likely the solenoid has gone to ground.

 

[rodbolt]

Re: what is the black goo.

ok<br /> if your blowing fuses with the key on engine off look for a bad wire or a bad solinoid. if you have 2 purple wires it may have the old auto choke. if it does its older than a 75 model. cut the purple yellow wire at the solinoid and eliminate it as a sorce of problems. if it is a 1975 model the wire was a left over and does nothing. it also may be hooked up to the wrong terminal. the 73 model was the last of the thermal assist chokes. now on to the plates<br /> if you close them with the manual choke no amount of throttle will open them. if they are opene and they dont move with throttle applied all is normal. they are not supposed to.to test the solinoid with a Ohmeter test from the purple yellow lead to the case, should be 4-6 ohms, test from the purplewhite lead to the case should be3-5 ohms.<br /> still sounds like you have a carb problem as well. with the choke shut and you give it gas it should die.

 

[firstimer]

Re: what is the black goo.

The engine could be older than a 75. the two wires are purple that lead to the solenoid. I just want to verfiy a couple of things. Are you saying thst i dont nedd the choke solenoid? Also, Are you saying that the choke plates dont adjust thenselves? If this is true than i have a perfectly running motor. Once again thank you so much,<br />brad

 

[rodbolt]

Re: what is the black goo.

hello<br /> its nice to have the electric choke feature but not nessasary. no the choke is not self adjusting and even the old thermal assist units were not true auto chokes. all the function of a choke or an enrichner in later years is to insure a very rich fuel mix requiered for gasoline internal combustion engines when cold. no reich mix no start and no run. its very simple. so if your happy with the manual choke and the engine runs fine otherwise its no worries.<br /> can you tell me what color the main engine harness plug is ?<br /> and dont confuse the choke plates with the throttle plates. 2 seperate animals that share the same cave

 

[firstimer]

Re: what is the black goo.

ok...i am understanding now. There is a maunual choke system. I am pretty sure i am talking about the choke plates. they are on the carbarators above the screws that you use to remove gas from carbs. The choke has to be on for the motor to run. its starts up real easy. but the problem is if i switch to automatic or i switch it to choke off it dies instantly. what do i do?<br />thanks again<br />brad

 

[rodbolt]

Re: what is the black goo.

if it dies when you open the choke you have clogged carbs. test compression and spark before any repairs. the only time it should be nessasary to engauge the choke, either manually or with the toggle switch, is for cold starts, once warm and idling it has to have the plates open. by holding them closed your bypassing all the carb circuits and forcing the fuel mix rich. if all was well it would die soon after starting if the choke shutters are closed. but a loss of compressin and the resultant loss of intake vacum can have a similar effect. test compression and spark before any futher steps.I take it this motor sat a bit

 

[firstimer]

Re: what is the black goo.

the boat has sat for quite a while without be dewinterized. there is a some black goo coming from the bottom choke plate. I just bought new spark plugs for it. i gapped them at .035. How would i test compresion? What should spark plugs be set at?<br />thanks again and again

 

[firstimer]

Re: what is the black goo.

I drained all the fuel out of carbs and bought new fuel for it. Is the black goo old gas bcause it sat for a while? probbably sat close to a year as far as i know. where can i find a manaul loccacly?

 

[LubeDude]

Re: what is the black goo.

Originally posted by firstimer:<br /> Is the black goo old gas bcause it sat for a while?

I would think that the Black Goo is gas and oil washing down the exhause from running so rich because you have to have the choke on to run the engine. RodBolt has it nailed, rebuild the carbs and fuel pump. Do a water pump also if you havnt already.

 

[firstimer]

Re: what is the black goo.

sounds goo. to i buy a kit to rebuild them and what does it ussually cost? Where can i find a kit to do it?