Yamaha 70B too much Autolube

[FishMan001]

I have a Yamaha 70B (2005), and recently, I checked the 2T oil injection function as per the service manual. It says 2.20cm3 +-0.50cm3 / 3mins.
Mine was 3.80cm3 / 3 mins for all cylinders.
Now I realise it's not a big deal, and that too much oil is better than too little, but I would like to get it down a bit. The manual doesn't say if, or how, the rate is adjustable, so, is there a way to do it ?

Cheers,

 

[Sea Rider]

That motor must run at the autolube oil setting it was adjused to at the factory, not more, not less. What I like is that at idle the motor will burn much less fuel/oil rate than the usual 50:1 pre mix motors and foul plugs way less.

Happy Boatng​

 

[boscoe99]

I have a Yamaha 70B (2005), and recently, I checked the 2T oil injection function as per the service manual. It says 2.20cm3 +-0.50cm3 / 3mins.
Mine was 3.80cm3 / 3 mins for all cylinders.
Now I realise it's not a big deal, and that too much oil is better than too little, but I would like to get it down a bit. The manual doesn't say if, or how, the rate is adjustable, so, is there a way to do it ?

Cheers,

3.80cm3 for each of the three cylinders?

Was the oil pump lever in the full throttle position?

Seems excessive. Have you thought about doing a 9 minute test for more accurate results?

Were you using Yamalube?

 

[99yam40]

I thought all Yamaha's used linkage from the carbs to the oil pump and it was adjustable. threaded rod

if it comes off the oil pump goes full on

 

[FishMan001]

Extract from the manual (and exactly as I did it):
1. Start the engine and set the idling speed at 1500 rpm by adjusting the throttle-stop lever.
2. Remove the oil-pump link-rod and fix the oil-pump lever in the full-throttle position.
3. Measure the oil discharge from each port for three minutes using a measuring cylinder.
Note: Oil temperature: 10-30˚C

I didn't actually check the oil temperature, but as it was a warm day, I assume it was in that range.
I haven't tried to do it over a longer period, but may do if I can find a way of adjusting the output.
I am using Quicksilver TC-W3 2-Stroke Oil, and realise the viscosity will not be exactly the same as Yamalube, but I can't see it being so different as to allow the pump to deliver nearly twice as much oil.

Cheers,