motor issues, carbs dirty maybe?

[2182]

motor is an 06 model but i hung it new midsummer 09. im not sure if the vaccum switch is a separate issue from the bogging down or not, like the sweeper idea. ill try it.

think model is jx150psd or something along those lines...

[eggsuckindog]

Isolate and Eliminate

start at one end of the system - btw squeezing the bulb will overide the fuel pump to eliminate that

[castalot]

How old is the gas mine did almost the same thing when I got it it ran good on a portable tank but not the main drained the 80 gallons it came with refueled and it's been good

[McGillicuddy]

Several good points made. I think Daltonmarine offers a good starting point. I'd start at the beginning of the fuel chain supply chain. Are you running off the main tank or auxiliary portable? Injecting oil or premix?

Assuming the primer bulb is still fully pliable, does it collapse at all when it cuts out? If so, that would likely indicate clogging between the tank and the primer bulb...or even a clogged or closed tank vent.
Here's what I found once that gave the same symptoms (my guess on this is that at some time silicone was used as gasket for sending unit which broke down and sunk to the bottom of tank) obviously no screen on my pick up tube:


Then check for water in the separation filter. Might just suck some fuel out into a clear container prior to the separator and see how it settles out...

No clogs, no water - work your way up to the fuel pump, fuel lines, then on to carbs... Bushwacker's logic makes a lot of sense if the problem isn't prior to the carbs.

Good luck, keep us posted

[76Red18]

If its a 60 degree 150 check the shift assist switch on the lower starboard side attached to the linkage. It kills power to 1 cylinder bank when shifting and will do some strange things to the power pack when going bad. Don't know if the 90 degree motors use them.