NEED HELP... :) 50 HP Mercury (71 mod approx )

[rivrunner]

I have a 14 foot tidecraft powered by a 50 HP merc .. sn#3235201 .. the boat has been sitting for a cpl years.. trying to get it running good.. the 2 main probs I have are;<br />1. going into reverse it slips .. once i get it to lock i can not throttle or it will slip !!! what should I ck ??<br />2. fuel leaks from the carbs causing it to loose tank pressure ( i think that is why i loose tank pressure!! ) it is loosing pressure and fuel leaks from the carbs.. <br /><br /> It runs good but I would think that a 50 HP would push this little boat a lot faster than it does!! it is a basic fiber boat nothing in it but the tank , battery , and seats.. what size prop should it have !!!<br /> any help would be great!!! Thanks

 

[skier]

Re: NEED HELP... 50 HP Mercury (71 mod approx )

jmalba:<br /><br />I might be able to shed some light on your first problem. Mercury used a "Dog Clutch" on your motor and over the years the edges wear down and it's hard to keep it in reverse and if you are you can't rev it at all. Unless you have a manual and are mechanically inclined, I'd let a Mercury Mechanic replace it for you.<br /><br />Some advice when you get it back. When putting the motor into reverse do it fast, the slower you ingage reverse the shorter life the "Dog Clutch" has. There is a noise that you'll hear the first time you do go for reverse. Don't let that noise last long at all.<br /><br />I hope this helps. LONG LIVE MERCURY OUTBOARDS.

 

[Trent]

Re: NEED HELP... 50 HP Mercury (71 mod approx )

I would first check the prop hub to make sure its not spun. And the fuel pump diaphram can cause the "tank pressure" to go down. Replace diaphram for less than ten dollars.<br /><br />Is fuel leaking from the carb with the engine in the down position? If so its time to tear them apart, put kits and floats in them. Sounds like the floats are sticking causing the fuel to run out of the carbs.<br /><br />BTW its a 1972 model.

 

[rivrunner]

Re: NEED HELP... 50 HP Mercury (71 mod approx )

Hey thanks guys... as for the dog clutch , is that the one that is located towards the back of the lower unit .. 2 piece plastic thing that somehow locks the moter in reverse and unlocks in foward ... i have changed the impeller and had a heck of a time figuring out where to position that little gear ... i prob have it wrong!!! and yes i want a manual for this motor ... <br /><br />on the carbs .. yes it leaks while in the down position .. should i still ck the fuel pump or go with the rebuild on the carbs or both... ??? <br />last thing ... how do i adjust the shift cables and throttle .... i put both new on .. where should i set the shifter and the cables... i just want to make sure i did it correct they were easy to put on but i may not have them adjusted right !!<br />Oh and thanks so much I hope to here from you all again ... knowledge is priceless