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Old 18-03-2007, 05:40 PM   #1
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Merc oil injection

Having spent most of the winter months making a more than a few mods/repairs to the boat & engine, it is now time to finally start putting it back together again. The engine is back in place and now I have to start reconnecting the cables and oil injection, and this is where my question comes in.
Is the oil injection self priming or do I have to bleed it at all? For the first run out I will certainly be running with a premix in the main fuel tank but how long could I expect to have to do this for before I can run with straight fuel and start relying on the oil injection system again? :
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Old 18-03-2007, 09:10 PM   #2
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Old 18-03-2007, 10:36 PM   #3
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I've got no idea about bleeding or priming your oil injection but I wouldn't run it with premix and the oil injection as thats effectively double oiling your motor. Double oiling is bad as it runs the motor lean.
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Old 19-03-2007, 07:49 AM   #4
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all i,ve ever had to do was remove the top of the resivior on the engine while its idling and the resivior fills up
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Old 19-03-2007, 07:58 AM   #5
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sinkunit is correct by undoing the top on the little res on the engine this will prime the system, but you might also want to crack the little phillips screw located on the oil pump! you do this while the engine is running you will find oil and air will come out at first then when the oil starts to flow with no air bubbles re tighten the screw, the oil injection is now bleed, job done
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Old 20-03-2007, 12:13 PM   #6
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Thanks for the advice gents - apologises for the late acknowledgment but work got in the way
The header tank is still "full" of oil anyway but it was just the concern of re-plumbing remote tank in again - at least I am now happy to fire her up again when the reconnection is completed.
I will certainly run with the remote system for the first few outings but will possibly disconnect it if i get chance during the summer season. Just out of interest for those that are pre-mixing are you still going for the 50:1 mix (think that was what my old engine was but been so long since I had to mix with the fuel) or are you using a different ratio??
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Old 20-03-2007, 01:07 PM   #7
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I run 40:1
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Old 20-03-2007, 10:09 PM   #8
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Depends what revs you want to pull. 50:1 should be ok but i'd run 40:1 to be safe, anything above 7k and you need 32:1 unless you are gav and then 100:1 is fine
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Old 22-03-2007, 08:56 PM   #9
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Quote:
Originally Posted by Ring Owner View Post
Having spent most of the winter months making a more than a few mods/repairs to the boat & engine, it is now time to finally start putting it back together again. The engine is back in place and now I have to start reconnecting the cables and oil injection, and this is where my question comes in.
Is the oil injection self priming or do I have to bleed it at all? For the first run out I will certainly be running with a premix in the main fuel tank but how long could I expect to have to do this for before I can run with straight fuel and start relying on the oil injection system again? :

I wouldn't rely on early merc oil injection at all, rip it off and run premix, no doubt then that the oil getting to where it should be
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Old 22-03-2007, 09:19 PM   #10
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Got rid of my oil injection ,,,,, day 1.
Do it now buster, any delay will cost ya!
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