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  1. M

    what does A26 1 mean?

    i posted this as an adjunct to a previous thread but got no response so i'll try here as a separate posting. after much removal of paint i have found the marking "A26 1" or possibly "A28 1" on the hub of my yamaha prop does any one out there know what this means?<br />there are also much smaller...
  2. M

    altitude

    how does altitude affect prop performance? is it just that altitude the engine creats less hp?
  3. M

    prop size 60 yam

    is the size of yam props printed on the prop? if so where, if not how do i know the size?
  4. M

    prop size 60 yam

    is the size of yam props printed on the prop? if so where, if not how do i know the size?
  5. M

    prop size

    i posted a while back about dropping the engine size on my 20ft semidisplacement hull from 60 to 40(thanks to all who offered advice)now i have decided to go ahead with the change as the old unit needed lots of work done to it and my question is, what size of prop? the prop calculator programme...
  6. M

    which engine for semidisplacement hull

    i run a "stewart-stevens" 20 ft fast fisher with a semi displacement hull and a 60hp Yam. at the moment at WOT i get 12-15mph on the GPS and with my 5hp emergency engine i can get 4-5mph. now the question...i am thinking of repowering with a 40 bigfoot by this i hope to save a bit of fuel...
  7. M

    topside leak

    i have a leak where the cabin meets the hull this allows rain water to run down the windscreen and into the cabin, it is no too bad but i would prefer for it not to happen. anxious to have to minimum work - namely i do not want to have to grind it down and reglass what do you think? silicone?
  8. M

    power tilt

    the power tilt on my yamaha 60 is no longer lifting the prop clear of the water, as i use the boat 3 or 4 times per week and there is a zinc fitted is this a problem corrosion wise (salt water)? i'm reluctant to take the boat out of the water unless i really need to - the season here is short...
  9. M

    prop problem?

    i have a 20foot boat of unknown origin, it weighs about 2000lbs and is currently powered by a 60 yamaha. the problem is that once above 3/4 throttle - sorry no rev counter - the prop seems to lose its grip on the water, the boat stops, the engine spins furiously but only suceeds in throwing...
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