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2006 Yamaha SX115 oil reservoir problems

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Snakeriversailor77

Contributing Member
I'm trying to diagnose a problem that is frustrating me. I've looked at the other posts on this and it's not quite the same as mine so sheer it is. The engine reservoir is not refilling from the secondary reservoir. Seems like a pump or line clog. Checking the pump and passing the wiring to it gets it to in but doesn't seem to pump any oil. The emergency switch to fill the reservoir doesn't activate the pump at all. Continuity in the line from the engine to the oil pump reservoir but doesn't seem to have any power to the cable in the first place. Doesn't send any signal at ignition on not running or running. The engine resevoir is down to the low mark and alarm is on. Float switch in engine resevoir has been replaced. Might be a clogged line but why no power and why isn't the pump running? Taking the boat resevoir tank out today to checked or sludge and or kinks. What else?
 
I have a different problem but will try and help. Take this all with a GRAIN OF SALT. I would test pump by itself by taking 12vdc directly to pump. On my boat I would disconnect plug by boat resevuior and take 12 to brown + and blue - wires. If pump runs I would disconnect the oil line to see if there is flow. I believe there may be sevral splice points in the oil line to disconnect to view oil flow. No flow clogged line or filter or bad pump. Yes oil flow - check 12vdc at plug- yes 12vdc at plug (which I think is designed to be there at all times) check ground. I believe the ground is what starts and stops the pump. From what I read the most likely problem is the main float switch in the motor oil resevuior. This float has 3 internal switches. Top shuts off pump. It may be stuck in the top position. Middle starts pump to fill to top. Bottom gives alarms and reduces RPM's. Buy a manual and start reading.
 
There is a seperate wiring loom from the engine to the tank. It is very long and some installers cut and join them to make them shorter. Check that you don't have a bad joint in that loom hiding some where.
 
Thanks everyone. I replaced the engine resevoir float switch. No change. Couldnt get the emergency switch to activate the pump at all. Checked continuity of the wires to the boat resevoir and pump. Continuity where it should be. No 12 v to the pump however. Tested the pump by jumping it to 12 v and found that it ran but didnt pump. Replaced the resevoiur, pump, lines and filter. Reatached all and used the new cable that came with the new unit (was less expensive to buy the whole assembly rather than chase and buy individual parts.) Still cold not eare pump run. After installing and using primer bulb, the main tank on the engine did refill to about half. Still have not heard the pump run. Stillde not run when the emergency swtch is activated.
 
A few things to check. I believe you can check the emergency fill switch from the harness. It should open and close as its activated. I think it will be open at rest and closed when activated. If this switch is not working you may need to replace the oil control unit. This unit is not serviceable on my motor. With key to ACC I would think you should have 12vdc at pump if you don't find out where the 12 should be coming from. Check the 12vdc positive from the harness but put your meter negative on battery negative when checking. Buy a repair manual. Could be a harness issue. You can also empty the motor oil tank and manually activate each switch on the float switch and follow the continuity from each switch. I believe the bottom two float switch wires are grounded to start pump. I would like to know how the top float switch closing stops the pump? Buy a repair manual.
 
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