start problem

[rebelmandziukan]

ok i have 3.0 leter merc with electronic ignition new battery,newly professionally remanufactured carb,good gas,new starter,new fuel pump. heres the problem on the trailer it starts and idles without any interferance from me. so i take to cocoa beach and put it in the water.it doesnt want to cold start.so i remove the throttle cable and hold the throttle open manually and it starts right up and runs fine. What gives? it started just fine on land what happened between land and launch that would cause me to have to help it out like that?

 

[WillyBWright]

Re: start problem

You are aware that there is a way to operate the throttle without shifting the motor? You don't have to disconnect anything.<br /><br />First thing that comes to mind is back pressure. On the hose there is no exhaust backpressure. The motor breathes very easily. Back it into water and it gets much more difficult. Nothing a healthy motor shouldn't be able to overcome. Exactly what is your starting procedure? Are you setting the choke?

 

[Bondo]

Re: start problem

heres the problem on the trailer it starts and idles without any interferance from me.

What does This Mean,.???<br />As in you Just turn the key,+ it's idling,.?? No Throttle,..???<br /><br />And,......<br />Why would you Remove the throttle cable to set the Carb to WOT,..????<br /><br />It Sounds like it was Flooded,.......... Why,..... I Don't Know........

 

[WillyBWright]

Re: start problem

At the risk of stating the obvious to an experienced boater, please bear with me for the sake of others that may not know...<br /><br />Carbureted motor starting procedure:<br />1. Make sure the water pump gets water whether it's on muffs in the driveway, or backed into the water. Trim the drive down to operating angle.<br />2. Put the throttle/shift lever into Throttle Only and move it to Full and back to Idle once or twice to set the choke and pump in some extra fuel for starting.<br />3. Advance the throttle just a bit for Fast Idle and turn the key.<br />4. If it doesn't start within 20 seconds, repeat step 2&3 and retry. Don't repeat more than 4 times or it'll probably flood. If it floods, advance the throttle to full and retry, being prepared to pull it quickly back to idle once it starts.<br /><br />Throttle Only is accomplished by pulling a knob or pushing a button at the point where the throttle/shift lever pivots while in Neutral, then moving the lever forward for Throttle Only, no shift. Those without knobs or buttons require that the whole lever be pulled out 1/2 inch or so.<br /><br />There is a whole generation now that has never had to deal with carbureted automobiles. Starting that kind of engine is rapidly becoming a lost art. And this situation is even a little harder because there is no automatic Fast Idle. It's 100% manual.

 

[rebelmandziukan]

Re: start problem

ok im going to daytona today i will try to find out how to throttle only. bondo yes it will start and idle without any movement of the throttle on land. ...update... i just went outside to the boat. there is a button that does throttle only..boy do i feel dumb.. I just dident know about that throttle only button. thanks once again for the info it should help with the problem.

 

[Bondo]

Re: start problem

bondo yes it will start and idle without any movement of the throttle on land.

Ayuh,.......<br />That was Just Luck,........<br /><br />Use Willy's sequence,+ It Should Start,......<br /><br />Land,.. Or Sea........

 

[rebelmandziukan]

Re: start problem

10-4 good buddy, wow i sure feel dumb

 

[rebelmandziukan]

Re: start problem

just got back from daytona, used the recomended throttle only method and had no trouble whatsoever starting the boat. had great day on dissappearing island, got sun burned, beached the boat about 4 times on different islands, found an awsome place to go camping.no problems at all. thanks to everyone here who gave advice.

 

[tashasdaddy]

Re: start problem

another happy ending.

 

[Bondo]

Re: start problem

'ell,...........<br /><br />I'm Still shoveling Snow............. <br /><br />Glad it worked Out.......I'll get My Chance at a Sunburn come May..............