1961 johnson 75hp 4 cylinder hesitation then dead please help

[jdoenumber2]

I have a 1961 75 hp johnson and it just died. to sum it up i was riding along and it would hesitate to pick up. It wouldnt accelarate and even wide open it could barley move. it just seems kind of funny because last time i took it out it seemed to run better then ever and gave no indication that there was any underlying problem. I do have repair manual and parts manual. What do you guys suggest i check first? Does this sound like a fuel pump issue possibly? you can see fuel in the eye glass and it doesnt seem to go past there.

 

[Patate]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

I dont know if the 75hp is like our 1965 60 hp was, but sometime, when we removed the cab, the carburator/timing linkage tilt 180 degres and after that no acceleration at all. We have to remove the cab, replace the linkage and be careful by replacing that heavy cab and voila, the problem was solved

 

[jdoenumber2]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

I took apart the fuel pump today and i am not too sure if the diaphram is shot. how do i check? What kind of condition should it be in??? no holes however it seems streched out. where do i get a new one or is there a generic material i can buy and cut my own???

 

[tashasdaddy]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

laingsoutboards.com has most everthing for that motor. when you say died. did it just cut off like turning the key, or did it rev up and not move or did it just slowly slow down. also any history and maintainance done.

 

[cougar1985]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

raised siberian for years, my faviorute was shasha. i probly got the spelling wrong,tashasdaddy.. in fla do they where sunglasses.lol.i use to come home and she would be on the deck and i would tell her to act like a lady and she would cross her legs lol. killed by a drunk driver.

 

[Joe Reeves]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

jdoenumber2..... What amount of time passed between the time the engine ran fine and when you encountered this problem?

 

[tashasdaddy]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

tashas, also crosses her legs, is extermely gentle and loyal, scared to death of kids. and loves the A/C. let me start messing with one of the boats and she is in it. all my boat now a Tashastoy I, II, III. she thinks they belong to her.

 

[jdoenumber2]

Re: 1961 johnson 75hp 4 cylinder hesitation then dead please help

one week ago it ran like a top. is it possible for the fuel pump diaphram to be too streched out? i didnt see any punctures. or what order should i trouble shoot it?