boat takes to long to plain off

[war eagle]

I have an early 70's mariner 25hp.It starts and idles good,but when i hammer down on the throttle it takes way to long to take off.It takes a little time to plain off.What could be the problem.And i have cleaned the careberatar 2 times.Everything on it seems to be fine and i just but new spark plugs in to.If anyone knows what could be wrong reply back.

 

[andrewkafp]

Re: boat takes to long to plain off

How big is the vessel that it's pushing ?

 

[seldont]

Re: boat takes to long to plain off

Over propped maybe?? Prop hub slipping?? Have you had it quite a while and it just started doing this or is it a recent aquisition??

 

[war eagle]

Re: boat takes to long to plain off

its a 14ft jon boat

 

[war eagle]

Re: boat takes to long to plain off

i haven't checked the prop for slipping yet

 

[war eagle]

Re: boat takes to long to plain off

but i dont think its that.Whenever i open the throttle all the way it starts out slow then kicks in and takes off.It might have something with the gas.idk.if anyone knows what could be wrong please reply back

 

[merc20]

Re: boat takes to long to plain off

Make sure the tank is properly vented. I have a 15 ft jon boat with a 20hp merc that takes off like a rocket. It jumps on plane with 2 guys and a boat load of hunting stuff.

 

[mellowyellow]

Re: boat takes to long to plain off

OK, I'll guess...<br />sticky float is flooding carb?

 

[bubbakat]

Re: boat takes to long to plain off

I do believe mellow-yellow is right on here. I had a 50 h/p that did the same and I changed the floats and needle and seats out set to specks and it takes off like a stripped ape now

 

[war eagle]

Re: boat takes to long to plain off

i took that carb of today and cleaned it and the float was sticking bad.so i let it soak for 1hr.It takes off faster then ever now.But now something ate up my water pump impeller.I took the lower unit off and gass poured out of the bottom.How could the gas be gettin down to it?

 

[war eagle]

Re: boat takes to long to plain off

thanks for all your help.I appreciate it

 

[rickdb1boat]

Re: boat takes to long to plain off

Unburned fuel will make it's way to the leg in the lower unit where it exhausts. I still think you may have problems with that float allowing too much gas to get through to the engine. Did you set the float level when you freed it up? Also, if it acts like it's sliiping into gear when you take off, it's more than likely the prop slipping on the hub, as suggested. Take it to a prop shop to verify, befroe you go looking for other problems.

 

[war eagle]

Re: boat takes to long to plain off

i figured it out.the fuel pump was bad and it was lettin way to much gas into the carb and was clogging it up and when i went to take off there was so much fuel in the carb that it took a while for it to run all that fuel out of the carb.

 

[war eagle]

Re: boat takes to long to plain off

i took my boat out today and it is running better then ever now.I will open it all the way and it will just throw me backwards and take off like a bullet.thanks yall..i appreciate it