merc clasic fifty power load problems

[druid_faith]

i have a mid 80's clasic fifty 45 hp
so far i have rebuilt the carbs,lower unit and rewired boat

the problem is in nutrel it will rev as high as i want and in gear out of water but as soon as it is put into gear in the water pushing boat it will not rev past what seems like 2k rpm but in nutrell it will when i first rebuilt all that was needed it worked great for an hour then just lost its power i still have great compression in all four cylinders and great spark clean gas filters and no problem with gas flow

please help

 

[Faztbullet]

Re: merc clasic fifty power load problems

Since you rebuilt carbs,did you check carb linkages to make sure carbs are fully opening? Is bottom carb opening, if not you may have lost coupling (#19)If its the year model with fuel pumps on the side of carbs, it could beone of the flapper check valves is stuck or sucked into passageway.

 

[druid_faith]

Re: merc clasic fifty power load problems

hello
yes all links are there and working properly the fuel pump gaskets/seals are new i am getting plenty of gas and it will rev up to red line point as long as there is no load on engine ie: boat in water in gear but in nutrel no probs correct compression on all 4 cyls



i am verry fustrated

 

[Dunaruna]

Re: merc clasic fifty power load problems

.....when i first rebuilt all that was needed it worked great for an hour then just lost its power .......

please help

My guess is you have missed something in the carbs, gunk or float level??????

You would not be the first, nor the last to rebuild the carbs 2 or 3 times before you strike gold.

Did you clean/replace the fuel filter? Fuel lines and tank clean? Primer bulb firm?

 

[druid_faith]

Re: merc clasic fifty power load problems

it is funney you should say that no the carbs are spotless ive rebuilt then cleaned them out (i have had off 7 times) all fuel filters are new tanks are new and the lines are new lol i do not know what to do i am just going to start replaceing things at randome soon

 

[druid_faith]

Re: merc clasic fifty power load problems

so does any body have any more ideas?


ive tried every thing i know

 

[salbarez]

Re: merc clasic fifty power load problems

Have you had any luck? I am having the exact same problem, but on a 2003 40hp elpto.