I have rebuilt carb, put on new prop (which is identical MW prop that got chewed up 10 1/4x14) but am still running 1000 rpm lower than last year. nothing on boat has changed....same weight same water. running at 4360 rpm WOT -21mph. last year 5380 WOT. when throttle lever is wide open carb...
tried adjusting carb on 1972 merc 402 40 hp. (i know,i know) cause ive lost wot rpm's. now it runs like crap and i cant dial it in. all i messed with is the mixture adj. screw. what is the correct tuning procedure to make sure my motor is running at its max. potential and not leaving any power...
1972 merc 402 40hp. i need to replace my prop. the number on the hub is "p14 614cup". im assuming the pitch is 14 but dont know the diameter cause the blades are ground off a little. think it hit a submerged road bed. if anyone can give me info on this number that would be great. also if i go...
i have a 1973 merc 402 40 hp and need a prop. the only number i could find is stamped on the back of the prop hub P14 (the 4 is not very legible, could be something else) P14 614 CUP . does this make sense to anyone? I cleaned up the prop really well and this is the only number. the prop is 13...
anyone know how to properly adjust carb. when i get wide open throttle adjusted it wont idle. when i adjust for good idle i lose high end and have hesitation on hole shot. all i have messed with is the idle/mixture adjustment screw. what am i doing wrong
i tried messing with my carb. (i know, i know ! ! !) Can someone tell me how to adjust this thing? 1972 merc 402 40 hp s#3407796. all i have messed with is the fuel mix adj.
1973 merc 402 40hp. last year ran perfectly. this year wont idle at all and will only come up to about 50% rpm under load. rpm is good with no load but still wont idle. ran it out of gas to store for winter so dont think varnish is problem. sea foam in gas and deep creep in intake didnt fix...
i've got a 1973 Merc 40 Hp. last year ran like a champ and would idle all day. This year just the opposite. Wont idle and only comes up to about 50% on RPM when in the lake. At home with the earmuffs on it accelerates perfectly (but still wont idle). Dont think varnish is an issue, ran it...
just rebuilt a 1973 astroglass bass boat and need electronics for it. fishing freshwater lakes 3'-20'. water is always stained with no more than 2' visibility. budget under 300.00. what fish finder should i be looking for
have a 1975 merc 402 40hp with mercontrol. on the mercontrol shifter, reverse and forward are backwards.(shifter back= forward) have had it apart but cant figure out how to fix it. boat works fine like it is but i'm one of those guys who wants everything to be the way it should be. HELP!!!!!!
