94 Mercury 225 enrichner

[2ndtry2]

I'm having a problem starting my 93 225. After sitting for a week, I cant get it to start without spraying fluid into carbs out of a can. If I run it day to day I have no issues, it fires right up. This past weekend I did a little checking and the enrichner did click, I did not pull off lines and check for flow but could hear and feel it click. Here is my question, the enrichner would only click once and with repeated tries would not click again. I checked voltage at the wire and I have CONSTANT 12 VOLT with the key on. Pushing the key does nothing but I get my voltage as soon as I turn the key on.

Thanks

[2ndtry2]

I should add that I checked these before launching this year and found with the hose removed they would trickle fuel for a few seconds when I turned the key on, again without pressing it in, then flow would stop. If I would turn key off, then on again it would trickle for a few seconds again. I assumed that this setup was controlled by something else and that pressing the key was not needed for these motors. It was like the enrichners were on some kind of timer. This is a twin engine boat, both operate the same but one fires right up all the time and the other requires the spray fluid after sitting for a week.

Thanks again

[W2F a V-King]

No...Key on and push in on the key gets power to the fuel solenoid. Sounds like the ignition switch is wonky.
Also while your checking this circuit...not related to constant key on power, but the ground side circuit connection gets corroded easily..seen that on more than one of my mercs.

Just for grins check your shop manual for a wiring diagram. My 93 175 is wired like all the merc's I've ever owned that had that solenoid.

That thing stays on and the top bowl on your carb will drain out into the lower 2 carbs....Never have been to crazy about that system.

HTH

James

[2ndtry2]

James, thank you very much for the reply. It might be unusual but I think i'm actually happy that I seem to have a problem. When you refer to the solenoid I assume you are talking about the enrichner itself, or is there a separate solenoid that controls the enrichner?

The only thing that I still dont understand is, although I have constant voltage with the key on, I have a distinct click with fuel flow and about 3-4 seconds later a soft click and fuel flow stops.

The boat really don't run bad, which I would think a constantly open enrichner would cause some very noticeable performance issues.

thanks

[2ndtry2]

Any other help or suggestions?

I came across this. Seems like this is the setup I have.

This is from the Merc manual. Good luck

Enrichment SystemThe Electronic Control Module (ECM) electricallycontrols the enrichment valve to provide a rich fuelcharge for starting a cold engine.The ECM monitors engine coolant temperature (thruthe temperature sensor) and ignition timing (thru thecrank position sensor).The ECM electronically opens the enrichment valvefor varying lengths of time – the colder the engine, thelonger the valve remains open. The ECM also advancesignition timing – the colder the engine, themore the ignition timing is advanced to improve coldstarting characteristics.Fuel is gravity fed to the enrichment valve from thetop carburetor float bowl. When the valve is opened,fuel is drawn to outlet ports on each carburetor flangeby crankcase suction. During cold start, throttle shuttersshould be closed – maximizing crankcase suction

– to draw ample fuel from the enrichment valveFuel Enrichment operates as a function of time andblock temperature.a. When block is cold and keyswitch is turned to“ON” position (engine not running), enrichmentvalve will provide fuel for 2 – 3 seconds.b. Enrichment valve will continue to provide fuelwhile engine is cranking until block temperaturereaches approximately 122° F (50° C), at which point it will no longer provide fuel.c. When block is hot (normal operating temperature– 140° to 155° F) enrichment valve will provide fuel for approximately 1/2 secondwhen key is turned to “ON” position. Thevalve will not provide fuel during cranking attemperatures above 122° F (50° C).MANUAL OPERATION OF ENRICHMENT VALVEIMPORTANT: Manual use of enrichment valve ifengine is warm could result in engine flooding.Enrichment Valve Test1. Remove top cowl.2. Remove ignition plate cover.3. Disconnect YELLOW/BLACK bullet connector(a) to enrichment valve.4. Remove plug from YELLOW/BLACK male connector(b) on ignition plate and connect male connectorto female connector lead of enrichmentvalve.Connest the RED to YELLOW/BLACKBLACK to Engine Ground

Set meter to 200 DVA.When engine is initiallystarted, DVAmeter will deflect to25 – 50 VDC.This will last only ashort period and willthen indicate 10 –15 VDC.If above results arenot obtained, valve

is defective.Should enrichment circuit of ECM fail, press buttonin on enrichment valve and hold approximately 5 seconds.

Release button. Start outboard.

[ultrafinder]

There is another wire near the main solenoid. It's the solenoid the the main power gets hooked up to. Around there you should find a yellow and black wire.

That wire allows you to activate the enrichener with the key pushed in. You can't have it both ways. Either automatic or manual. You have to unplug the existing signal wire going to enrichener and plug the other in.




Any other help or suggestions?

I came across this. Seems like this is the setup I have.

This is from the Merc manual. Good luck

Enrichment SystemThe Electronic Control Module (ECM) electricallycontrols the enrichment valve to provide a rich fuelcharge for starting a cold engine.The ECM monitors engine coolant temperature (thruthe temperature sensor) and ignition timing (thru thecrank position sensor).The ECM electronically opens the enrichment valvefor varying lengths of time – the colder the engine, thelonger the valve remains open. The ECM also advancesignition timing – the colder the engine, themore the ignition timing is advanced to improve coldstarting characteristics.Fuel is gravity fed to the enrichment valve from thetop carburetor float bowl. When the valve is opened,fuel is drawn to outlet ports on each carburetor flangeby crankcase suction. During cold start, throttle shuttersshould be closed – maximizing crankcase suction

– to draw ample fuel from the enrichment valveFuel Enrichment operates as a function of time andblock temperature.a. When block is cold and keyswitch is turned to“ON” position (engine not running), enrichmentvalve will provide fuel for 2 – 3 seconds.b. Enrichment valve will continue to provide fuelwhile engine is cranking until block temperaturereaches approximately 122° F (50° C), at which point it will no longer provide fuel.c. When block is hot (normal operating temperature– 140° to 155° F) enrichment valve will provide fuel for approximately 1/2 secondwhen key is turned to “ON” position. Thevalve will not provide fuel during cranking attemperatures above 122° F (50° C).MANUAL OPERATION OF ENRICHMENT VALVEIMPORTANT: Manual use of enrichment valve ifengine is warm could result in engine flooding.Enrichment Valve Test1. Remove top cowl.2. Remove ignition plate cover.3. Disconnect YELLOW/BLACK bullet connector(a) to enrichment valve.4. Remove plug from YELLOW/BLACK male connector(b) on ignition plate and connect male connectorto female connector lead of enrichmentvalve.Connest the RED to YELLOW/BLACKBLACK to Engine Ground

Set meter to 200 DVA.When engine is initiallystarted, DVAmeter will deflect to25 – 50 VDC.This will last only ashort period and willthen indicate 10 –15 VDC.If above results arenot obtained, valve

is defective.Should enrichment circuit of ECM fail, press buttonin on enrichment valve and hold approximately 5 seconds.

Release button. Start outboard.

[ultrafinder]

There is another wire near the main solenoid. It's the solenoid the the main power gets hooked up to. Around there you should find a yellow and black wire.

That wire allows you to activate the enrichener with the key pushed in. You can't have it both ways. Either automatic or manual. You have to unplug the existing signal wire going to enrichener and plug the other in.




Any other help or suggestions?

I came across this. Seems like this is the setup I have.

This is from the Merc manual. Good luck

Enrichment SystemThe Electronic Control Module (ECM) electricallycontrols the enrichment valve to provide a rich fuelcharge for starting a cold engine.The ECM monitors engine coolant temperature (thruthe temperature sensor) and ignition timing (thru thecrank position sensor).The ECM electronically opens the enrichment valvefor varying lengths of time – the colder the engine, thelonger the valve remains open. The ECM also advancesignition timing – the colder the engine, themore the ignition timing is advanced to improve coldstarting characteristics.Fuel is gravity fed to the enrichment valve from thetop carburetor float bowl. When the valve is opened,fuel is drawn to outlet ports on each carburetor flangeby crankcase suction. During cold start, throttle shuttersshould be closed – maximizing crankcase suction

– to draw ample fuel from the enrichment valveFuel Enrichment operates as a function of time andblock temperature.a. When block is cold and keyswitch is turned to“ON” position (engine not running), enrichmentvalve will provide fuel for 2 – 3 seconds.b. Enrichment valve will continue to provide fuelwhile engine is cranking until block temperaturereaches approximately 122° F (50° C), at which point it will no longer provide fuel.c. When block is hot (normal operating temperature– 140° to 155° F) enrichment valve will provide fuel for approximately 1/2 secondwhen key is turned to “ON” position. Thevalve will not provide fuel during cranking attemperatures above 122° F (50° C).MANUAL OPERATION OF ENRICHMENT VALVEIMPORTANT: Manual use of enrichment valve ifengine is warm could result in engine flooding.Enrichment Valve Test1. Remove top cowl.2. Remove ignition plate cover.3. Disconnect YELLOW/BLACK bullet connector(a) to enrichment valve.4. Remove plug from YELLOW/BLACK male connector(b) on ignition plate and connect male connectorto female connector lead of enrichmentvalve.Connest the RED to YELLOW/BLACKBLACK to Engine Ground

Set meter to 200 DVA.When engine is initiallystarted, DVAmeter will deflect to25 – 50 VDC.This will last only ashort period and willthen indicate 10 –15 VDC.If above results arenot obtained, valve

is defective.Should enrichment circuit of ECM fail, press buttonin on enrichment valve and hold approximately 5 seconds.

Release button. Start outboard.

[2ndtry2]

Thank you ultra
so there are two wires one gives constant hot and ecm controls enrichner or you use the other wire and control it by pushing the key

so that would tell me that the way I'm setup now being I have a constant hot with key on that the ecm is controlling the ground side of the solenoid. If I switch the wires to use the push key hot I don't understand where the ground will come from? Seems the ecm will still be in control and I'm just supplying 12 volts through different means. Push key as opposed to key on.
thanks again!!

[2ndtry2]

Anyone else???
headed down to the boat this weekend

thanks for the help/ suggestions