Bypassing the oil pump

[smsscuba]

I have a 1998 Johnson 35hp BJ35ARLECR.Am I able to bypass the oil mixing pump by rather premixing 50:1 and letting the fuel/oil mixture pass through the pump (2 stroke bottle empty and the oil level sensor fixed in the "full" position) rather than removing the pump altogether from the engine.I don`t want to cut any wiring related to the oil pump . Is this oil mixing pump mechanical or electrical driven, as the only wires I can see are going to the oil level sensor.

Any suggestions ?

 

[wilde1j]

Re: Bypassing the oil pump

See sticky under Top Secret File.

 

[boobie]

Re: Bypassing the oil pump

You should try it and see what happens. I never tried it but you might be on to something. Let us know.

 

[smsscuba]

Re: Bypassing the oil pump

Thanks for the info, but this oil pump is not VRO type.Can anyone please help me out here, the question remains,can premixed fuel be run through the oil mixer when the container bottle has no oil in it?

 

[boobie]

Re: Bypassing the oil pump

It's not really an oil pump. It's a mixing valve and thats why the mtr had two fuel pumps on it.

 

[boobie]

Re: Bypassing the oil pump

It's not really an oil pump but everybody calls them that. It's actually a mixing valve and that's why they had two fuel pumps on that mtr.

 

[boobie]

Re: Bypassing the oil pump

Sorry about double posts, pushed wrong buttons again.

 

[smsscuba]

Re: Bypassing the oil pump

Another question came to mind, if the oil storage container is empty:

1) can air be mixed with the fuel via the oil mixing valve?
2) can fuel be sucked into the oil storage container, filling it up?

or am I just being silly?

 

[boobie]

Re: Bypassing the oil pump

Silly !

 

[smsscuba]

Re: Bypassing the oil pump

maybe I am being silly...lol

 

[noelm]

Re: Bypassing the oil pump

why not use the auto oil mixing system that is on the motor? it will work far better than mixing yourself.

 

[smsscuba]

Re: Bypassing the oil pump

noelm, i tried earlier on this evening to remove the oil tank, it won`t budge, so as you have commented, i think i will carry on using the oiling system on the outboard.As far as the previous owner knows, it has always been ok, never broken down.

 

[boobie]

Re: Bypassing the oil pump

Good Luck. Get back to this forum when you have 2 or 3 pistons scored due to lack of lubrication because fuel got in the oil tank leaned it out too much.

 

[smsscuba]

Re: Bypassing the oil pump

boobie, you know what, when I was emptying the oil bottle out, I swore I could smell petrol, and the oil looked too runny.You know, you may be on to something there.The reason why I wanted to give up and continue using the oil system is that I cannot remove the hose from the bottle underside.Any tips here? If I can get the hose off, I`ll plug it with a bolt.

 

[1fishbone]

Re: Bypassing the oil pump

Is it broken?
Post your symptoms and there are good people to help you.

That is a tank with a METERING valve to add the correct amount of oil.

There is also a CORRECT way to by-pass it.
But why?
Is it broken?
Post your symptoms and there are good people to help you.

You're determined to be 'creative' and blow your engine!

 

[smsscuba]

Re: Bypassing the oil pump

1FISHBONE: I don`t know for sure if the previous owner used the oiling system or premixed, but I noticed a lot of petrol mixed with the oil, all this within the storage bottle.Sorry for sounding silly, I want to make sure the engine is indeed oiled ok, so I would rather premix.

Suggestions?

 

[1fishbone]

Re: Bypassing the oil pump

I understand.
Try removing some of the 'oil' and try the flame test.

DO IT SAFELY NOW!!
Do it away from the boat, away from all other flammables!

Oil will burn but if there is any gas in it it will POOF

I'll can't understand why someone would do that..but maybe he did!!
Maybe it's cheap oil!
Maybe he tried to 're-engineer'!

Maybe some else can help with a diagnostic test to see if it actually works without running the engine.

Sorry for the mis-understanding.

 

[smsscuba]

Re: Bypassing the oil pump

They used the good OMC oil(red in colour),was given 5lt with the outboard .I spoke to a mechanic at an outboard service yard down the road, he told me to remove the bottle and plug the line from the bottle to the mixer with a bolt for a tight seal and premix as usual.

 

[Davro]

Re: Bypassing the oil pump

I removed the complete unit and put in a fuel filter. Looks pretty neat. I did this because I had previously had problems with it oiling up and not starting well. Some people though had problems with no oil in fuel which was obviously worse.

 

[smsscuba]

Re: Bypassing the oil pump

I have now bypassed the mixing valve and premixing 50:1.A point to remember though, the oil level float had to be fixed into position well above the circlip in the centre, as it seemed to run on an "emergency mode " when fixed anywhere lower.

The outboard is running sweet, no more worries about lubrication.