Mercury 175 V6 - Bogs down under load

[Dukedog]

if tha vent is stopped up usually tha blub won't pump up or will suck it flat and stay that way..........

 

[Trophygamefishingclub]

The boat stood for a long period,i did remove the carbs and cleaned them,new fuel as well,once under load i re prime the bulb a few times ,the motor regains all her power and performs normal

 

[Dukedog]

i would check tha anti-siphon valve jus ta be sure.... hard ta really get a grip on tha problem ona computer.. one thing i do with a fuel delivery problem on any carb motor thats really hard ta find is install a small (low pressure) electric pump and relay... seems ta cure justa 'bout all "unknowns" with fuel delivery.......this elliminates tha mechanical pump and bulb........... jmo.

 

[Trophygamefishingclub]

Thanks im on it,i actually ordered one yesterday.let see,thanks for the advise,ill keep you posted

 

[Trophygamefishingclub]

I finally installed a 4 psi elec fuel pump,she starts up fine,when warm, it seems the idle ondulates,could this be from the new elec fuel pump,or spark plugs fouled?

 

[Dukedog]

have never seen/had that problem at idle so it would be a guess but pump shouldn't be tha cause........

 

[Trophygamefishingclub]

Thanks for your quick reply,could it be that i now installed a elec fuel pump,i need to adjust the idle down?
it on or just above a 1000 rpm

 

[Dukedog]

try 8 ta 850 in gear...adjust with idle timing screw only... thats more than tha book calls for but that's jus my preference for production motor...........

 

[Trophygamefishingclub]

ok will do this,thanks

 

[Trophygamefishingclub]

Hi,I finally got the chance to launch on Monday 17 April,The 4 psi elec fuel pump,made the difference,no more bogging down,i now only have a irregulated idle,i did clean the plugs well before going out,any light on this?