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66 evenrude

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Raymond K

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Got a couple questions about a 66 evenrude 80hp 2 stroke cleaned out carb but still seems like it going through a ton of fuel and is down on power any suggestions. Also could one hook up a low pressure fuel pump to this engine say 2-3.5 psi
 
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Outboard fuel pumps are elegantly simple.----A new diaphragm will likely fix it.----And how much is " a ton of fuel " on this motor ?-----Do you have spark on all leads.----Post results of a compression test.
 
I havent done a compression test I will get you the results of that , sorry I failed to mention that I have replace the diaphragm in fuel pump and it goes through about 5gallons in 2.5 hours
 
Model # is ?----Electric shift or standard shift ?---I would say that is excellent fuel consumption for that motor !!-----And what else have you done on this motor.----Saves me from pointing out all the little details on that simple motor !
 
Model is 80693 but have to use model#80692 for parts. Yes its electric shift, engine wise all ive done is spark plugs cleaned carb and the diaphragm in fuel pump and ignition coil
 
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The boat has set for 6 years prior to me getting it which was only on water a couple times and sat for around 10 years before that
 
Raymond K said:
I havent done a compression test I will get you the results of that , sorry I failed to mention that I have replace the diaphragm in fuel pump and it goes through about 5gallons in 2.5 hours
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What are you complaining about? That's not excessive for that motor. Um, at what speeds?
 
I didnt realize a water pump impeller would cause a problem but I have also replaced that is there a sensor that could possible need replaced? I sounds like it stumbling when trying to get up to speed thats why I thought fuel to begin with
 
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So what is the issue with the motor ?----No power?----Won't idle ?----What pitch is the prop ?----What boat ?----A new impeller may save you a lot of grief later.
 
Idles fine, just is stumbling when getting up to speed, thought maybe fuel or ingition the boat is a 66 starcraft, the prop is in middle adjustment
 
This is really a stupid question, but did you check the intake screen under the carbs to see that it's free and clear?
 
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