motor bogging

[keepitgreen05]

i took out the v20 i have just bought. the motor ran fine at home with the muffs on once i put it in the water if bogged out and once i put it in gear it bogged out please any help and i put 25 fresh gallons of gas in today also

[spareparts]

what kind of motor are we talking about?

[keepitgreen05]

its a 1987 140hp johnson outboard

[tsubaki]

First two indications I pick on when this happens is contaminated fuel or restricted/clogged jets in the carb bowl.
It don't matter either way, I'll usually pull the bowls and clean the carbs. Normally fixes the problem. If not then at least this part is off my mind.

[keepitgreen05]

ok i will try to clean the carb thanks

[tsubaki]

There is a process possible that may not completely fix the problem that most people frown upon but may give a good indication if the bowl and jets needs cleaning.
Unscrew the drain plugs in the bowls, prime the bubble till a good flow of gas comes out, remember the flow, spray carburetor cleaner into the drain but contacting the orifice toward the jet, continue spraying till it sprays unobstructed, immediately prime the bubble to flush the cleaner out, see if the flow improves.
It may take several tries, it may damage the needle seats and/or float, causing you to have to get a rebuilt kit.
Safest, no cost way is to remove the bowls and go from there. Cleaning stubborn jets can be done with a pick method, copper wire is preferred.

[Retired]

The best way to isolate possible bad fuel, debris, etc in fuel tank is to hook a portable six gallon tank directly to engine. If it runs fine with portable tank with new fuel then problem is with installed tank, ie, bad fuel, bad hose, primer bulb, anti siphon valve, etc.