Engine Check

[fetoma]

So while I'm waiting on my electrical parts, I figured I'd ask about the engine. It's a 1986 Johnson 140 looper (J140TLCDC). Being a used purchase, I'd like to check with you guys about what you would do to check the engine before dropping her in the water. Spark plugs, changing gear oil in lower unit, things along those lines. What would you recommend?

[Destroyer]

New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump. New water pump.

Ummmm... did I mention an new water pump? Not just the Impeller, the whole thing. It's not that much money, and it will give you peace of mind as well as possibly save you replacing the engine. Overheated engines are one of the leading causes of engine failure. Impellers should be replaced yearly or at the very least bi-yearly IMHO

[THEFERMANATOR]

Water pump, gear lube, zincs, check to see if it has the white or black thermostats in it, make sure they're the black ones, replace the vernatherms at the minumum, but if they're very old it doesn't hurt to do the whole thermostat and housing assembly, thermostat diaphrams, replace all the lines that run from the thermostat housi,g up to the throttle diverter valve and the supply and vent hoses for the valve, replace the seal in the valve(when they leak, it showers the under side of the cowling with pressurized water, check your throttle linkage to make sure it's good and free, check the link and sync for the carb and timing linkage, check the timing(NO MORE THAN 18 DEGREES ADVANCED, unless you like burning up your outboard), make sure the airbox is installed with the baffle plate, and that it is pulled down snug so air can't get sucked around it(this can lean it out, and burn a piston QUICK), run champion plugs, and I prefer the ql77yc4 plugs. The manual calls for ql78yc, but I always had problems with them fouling at idle without oil injection.

[fetoma]

Excellent replies from you both. Thank you!!!

[steplift20]

I'm not sure but I think they want you to replace the water pump