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Did you check for a water (fuel)-logged float?

I've got a blown Honda BF8AX that has the same fuel pump (and a tiller handle) and live near Toronto (2 hrs). Contact me privately (use the upper right hand envelope) if you are interested.

As per Brunswick Marine: Mariner Japan Sourced 1974-1992: 6E9 102889 1984 6E9 103919 1985 Your Mariner (6E9 S 103761) is a 1984 model.

Rope Start or Electric Start?

85ESL73M= 1973 85HP Johnson as per maxrules.com

You're right 5hp. Frame Number BF50L-1000001 and up Model Year 1985

#39 in gearcase parts diagram Part No. 318972 Seal, Impeller Housing to Driveshaft

I get: Model 25M Serial Number 648-11671 - 648-14070 Year 1974

1960 Impala 2-door hardtop.

Nearest I can figure/find out: 2502 = Horsepower/Generation F = 1989 (model year) 10378 = Serial Number For parts, call your local Yamaha Marine Dealer.

No...not normal. Brown to brown-yellow should be 750-950 ohms.

Bingo! I had an older Honda in the shop with the very same symtoms. Turned out the exhaust manifold had a hole burned through...Too bad the part was NLA and was not financially feasible to remove the powerhead.

Normally connected to the fuel pump with a see-through hose (NOT the fuel line). This hose allows the skipper to view the condition of the fuel pump diaphram. If you see fuel in the hose, you have a ruptured diaphram.

Also note that this motor is suffering from the all-too-common "Mercury Wiring Insulation Rot".

4th picture in (IMG 6852)...see the flush-mounted, slotted screw? That's the fill screw.

If tilt goes up and down, your pump appears to be working. Try operating pump up and down a few times to bleed any possible air in the cylinder(s).

See those hydraulic lines on the left? Follow them back to the pump.

The motor drives the pump, the pump pushes the hydraulic fluid to the cylinder(s)...the fill screw is on the pump.

Last picture...that's the PTT motor, pump is at the other end of it.

...maybe it was once owned by Pete Maravich.