1978 Evinrude 140 HP has no power

B

Bedasi

Recruit
Joined
Jul 22, 2006
Messages
1
I just bought an 18ft Stingray Marquis sport boat. Runs and sounds ok, but I feel like it should have more power. At top speed with just me I can go about 25mph. With my girlfriend and 2 dogs, maybe 22mph. Pulling a tube, about 15mph. Does this seem normal? And it's take off is very weak. Takes about 60 seconds to get to it's top speed. I think it can do better, but what can I do to get it there?
Thanks for any suggestions!
 
W

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: 1978 Evinrude 140 HP has no power

1,2,3.
1, do a compression test on all 4 cylinders
2, do a spark test on all 4 cylinders, under a load if possible.
3, make sure carbs are sparkling clean. Every orifice tube, jet, and passageway.
 
F

freddyray21

Commander
Joined
Jun 10, 2006
Messages
2,460
Re: 1978 Evinrude 140 HP has no power

you should get close to 40 mph out of that motor. with four in the boat I would think
 
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