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Old 25 May 2012, 09:08   #1
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Can't get top speed?

I am having a frustrating time with my Mercruiser/Stern Drive?
After having treated my fuel system for "Diesel Bug" I have not been able to achieve top speed. The Engine sounds sweet and all seems good but only getting 22knts at best. I have had 29/30 knts previous.
Could this be down to the treatment or something else.
I feel it is Stern Drive problem but I am open to suggestion?
Cheers all, and enjoy the weather
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Old 25 May 2012, 11:06   #2
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Is the hull clean? Try to plumb in in a small fuel tank with a fresh batch to see if it's actually (still) the fuel?

jky
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Old 25 May 2012, 13:14   #3
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Are you getting up to the right rpm? Did you change all filters? Could it be fuel starvation at full throttle?
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Old 25 May 2012, 13:55   #4
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Quote:
Originally Posted by Erin View Post
Are you getting up to the right rpm? Did you change all filters? Could it be fuel starvation at full throttle?
Keith's right; I'd definitely check the filters.
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Old 25 May 2012, 15:12   #5
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Check for twisted / kinked fuel lines
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Old 25 May 2012, 17:19   #6
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I'd go the hull way
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Old 25 May 2012, 18:31   #7
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Clean hull and clean prop, we had a similar problem with a kad32, was growth on the props.
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