1975 Evinrude Bogging

cooksey3203

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Joined
Jul 6, 2008
Messages
2
I have a 1975 Evinrude 70 HP with a jet pump. This weekend it just bogged and stopped running at full throtle. I got a tow up the river and the guy reccomended a guy he knew that worked on outboards down the road because it would just crank really slow and wouldn't start. So I took it up to the guy and we worked on it together until finally decided to drop the pump since he said I could have a ceased bearing in the pump and he was right. It turned over freely and started so yesterday we spent the day replacing the bearing in the pump, luckly this guy was also a machinist and had machinist equiptment to get the old race out of the housing. I left the boat there overnight that previous night and came back Saturday to work on the pump. We got that job done and took it out and it bogged. He checked everthing he could think of, getting spark, getting fuel to the carbs. Now it just bogges consistantly and will not even get my 1752 Blazer up on plane. He said when the bearing ceased it could have knocked it out of time or I have carb issues but what I don't understand is why it ran good before the bearing went out and I took it to him for that. I don't think he would have adjusted something wrong intentionally just to get more $$ out of me, but if he did what would be the most likely think he could have done? I just can't get over how it ran good until the bearing froze which to me is an unrelated to the bogging issue. He did say he advanced the timing down at the river yesterday 2 degrees and it seemed to at least start better after that. I can get a timing light but where is the adjustment and is it something I could check myself or could I just have carb issues all of a sudden. The compression read 149,135,135. What about a stator, or another guy down there said something about sucking a reed? Also, just for a second every once in awhile it sounds like it starts to get power and take off, but just for a second and then goes back down and boggs.
 
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Benny1963

Lieutenant
Joined
Sep 17, 2006
Messages
1,476
Re: 1975 Evinrude Bogging

check for sheered flywheel keeper
and check carbs
 

Benny1963

Lieutenant
Joined
Sep 17, 2006
Messages
1,476
Re: 1975 Evinrude Bogging

check your static timeing useing joe reeves method to see were its at
 

ponyPWR01

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Joined
Jul 11, 2007
Messages
6
Re: 1975 Evinrude Bogging

i have a 1971 johnson 50 horse and im having same problem/ i need help! i cleaned carbs out... new fuel lines/new fuel tank/ new fuel. it just cant get plained out... would love to know the answer too
 

cooksey3203

Recruit
Joined
Jul 6, 2008
Messages
2
Re: 1975 Evinrude Bogging

OK I will check timing but I would need to know what is should be set at, 6,8,10,12, etc. for setting static timing, that is at what degree on the flywheel does the #1 cylinder fire? If that doesn't check out, then I will have to pull the flywheel and check the keyway, correct? If that all looks good, run Seafoam through the fuel system before I go all out and do a carb rebuild?
 
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