Helicopterjohn
New member
Hi Guys,
I have what a believe is a 1984 Evinrude 70 HP with throttle issues. I purchased a boat recently with this motor and it has not run properly since my purchase.
I have the motor in a barrel and it idles fine and it will run like a charm on the lake at WOT. However, it will stall during transition from idle to WOT. If I press the enrichner once or twice as it begins to studder it will get past that part on the acceleration process.
I have cleaned the carbs and done the link and sync and read posts on various forum on this subject till my eye were tired. I have had the motor to a dealer and one other guy that is supposed to be good with outboards. They say the motor is noisy and is not worth putting any more money in.
It has 120 PSI on all 3 cylinders within 1 PSI.
I am just about ready to deep six the thing. I noticed that one of your guys mentioned something about drill out the jets about .002. I have attached a few pictures.
Which jet shown in the pictures needs to be enlarged to get better transition from idle to WOT?
I am also told that the 75 HP Evinrude motors of that era had and adjustable low speed needle and that helped with transition problems. If so, is there a particular year and model I should look for.
Any help would be appreciated.
Thanks,
John
I have what a believe is a 1984 Evinrude 70 HP with throttle issues. I purchased a boat recently with this motor and it has not run properly since my purchase.
I have the motor in a barrel and it idles fine and it will run like a charm on the lake at WOT. However, it will stall during transition from idle to WOT. If I press the enrichner once or twice as it begins to studder it will get past that part on the acceleration process.
I have cleaned the carbs and done the link and sync and read posts on various forum on this subject till my eye were tired. I have had the motor to a dealer and one other guy that is supposed to be good with outboards. They say the motor is noisy and is not worth putting any more money in.
It has 120 PSI on all 3 cylinders within 1 PSI.
I am just about ready to deep six the thing. I noticed that one of your guys mentioned something about drill out the jets about .002. I have attached a few pictures.
Which jet shown in the pictures needs to be enlarged to get better transition from idle to WOT?
I am also told that the 75 HP Evinrude motors of that era had and adjustable low speed needle and that helped with transition problems. If so, is there a particular year and model I should look for.
Any help would be appreciated.
Thanks,
John