Moderated Discussion Areas
ContinuousWave: Whaler Performance
|Author||Topic: 1981 rebuilt|
posted 03-22-2004 11:13 AM ET (US)
I recently traded in my 1977 200 HP Johnson for a rebuilt 1981 200 Johnson. To my surprise the 1981 is slow, eats more gas, and I have not been happy. The marina told me they put on a low compression gasket beause of the fuel problems they see with todays gas - they also said I need to put another 20+ hours on the motor and I should gain more power. The 1977 would pull the ski rope out of my hands and the 1981 does not even get me up - it is not the prop - it appears to be the motor. Does this sound right? Any one have experiance with a low compression gasket - should I swap it out with a "normal" gasket? Is a 1981 Johnson a good motor?
posted 03-22-2004 05:35 PM ET (US)
I don't think the Low Compression Gasket will give you any noticeable less HP.
I have done this on my 1985 150 HP Evinrude and discussed this in another thread.. Here is the quote from that thread:
I ordered a pair of this head gaskets and installed them myself.. Very simple. I cannot believe how quiet the engine runs now. It is unbelievably quiet compared to what it was.. Almost sounds like a 4 stroke when cruising as I have no problems having a converstaion with other people on board. I can now also run the lower 86AKI Unleaded fuel which costs about .10 cents less a gallon.. 60 gallons equals a $6.00 savings per tank.
I may not have the total 150 hp as it used to produce, but I surely can't tell the difference... Also, the newer engines aren't included in any of the above.."
I have not noticed any difference in top end speed although I do not have a GPS to calculate exact top end.. My engine has plenty of power... I am not sure why your engine does not have the power to pull a skier up...
posted 03-22-2004 08:34 PM ET (US)
I see no reason to believe that 20+ hours will increase the horsepower. This would suggest that the rings are "breaking in", which I believe is an old wives' tale (sorry PCers)! When I rebuilt my 1981 Evinrude, it did not gain any power after 20 hours.
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