Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Highlighted
Mate
Posts: 4
Registered: ‎05-27-2014

88 70 hp

Hello, I have a 1988 70 hp on my procraft and have been haveing trouble at idle and throttle responce, stalling takeing throttle, i replaced all the lines and bubble, also put a fuel pump on it and removed the vro since previous ower had trouble with it, installed the fuel pump for a 70 hp, i put all new parts on the throttle linkage and tried to link and sink correctl, marks line up but i havent checked the timing at a low idle yet, carbs have been just recently cleaned and i pulled them off and checked everything again, all passages are clean. The motor will idle but when it sits idleing in the water it will slowly stall, when i crank it up and go to give it the throttle it bogs unless i rev it up and hit the throttle quick.

What should the timeing be at a low idle is it 5 degrees advance?

any ideas what may be the cause of this?

Highlighted
Admiral
Posts: 9,454
Registered: ‎07-14-2011

Re: 88 70 hp

[ Edited ]

Check the cylinderhead temp at idle to see if the thermostat is working OK. Compression has to be good on all cylinders. #2 is famous for being scored if the engine has overheated during its lifetime.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


Highlighted
Mate
Posts: 4
Registered: ‎05-27-2014

Re: 88 70 hp

temp is good just had the thermostat replaced, cyclinders are at 120

Highlighted
Mate
Posts: 4
Registered: ‎05-27-2014

Re: 88 70 hp

had the thermostat and the water pump replaced at the same time since then its been more noticeable with stall at idle and throttle up
Highlighted
Admiral
Posts: 9,454
Registered: ‎07-14-2011

Re: 88 70 hp

[ Edited ]

Bogging is most often in the carb's mid-range circuit or the timer base sluggish or stuck. Sync and link timing has to be correct, too. Refer to the service manual for the specs and procedure.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


Highlighted
Mate
Posts: 4
Registered: ‎05-27-2014

Re: 88 70 hp

thank you