Originally Posted by Nyarla
The prop is a Laser II and has the 3 holes each with a bung in it with a hole about 7 mm in the centre of each bung. I assume these holes are calibrated and allow exhaust out to allow the prop a little cavitation at low revs, high throttle so the motor doesn`t bog down thus allowing faster accel from standstill. Are you saying that you recommend no hole? Or that some people remove the bung completely and that is a problem? Also why do you not recommend foils, I have had good results on 150 Johnsons with the rib becoming easier to steer and planing much happier when heavily loaded.
Oh and thanks for all the advice
I believe that you can get bungs with different size holes - but my prop was a small hub with only one choice of bungs - no holes in them.
You are correct about how the holes work - allowing the prop to ventilate to prevent the motor bogging down. However, with 135hp, I don't think that this would be a problem for you anyway. My boat worked best / most predictably with the holes closed.
Anyway, its a cheap and easy thing to try out first.
Have never used the foils but am sceptical of anything that can be added to "improve" an engine that the manufacturers don't use. Still, relatively cheap to try out and may calm things down a bit.
Is your throttle cable stiff as has been suggested? If so this would be a worthwhile route of investigation.
Try undoing the throttle cable friction screw on the throttle box. If the throttle does not slow ly back itself off then chances are the cable is a bit sticky.
Some engines have a very definite point where they come into their power band and with a sticky throttle it is very difficult to fine adjust the speed in the range where the engine is just starting to make good power.