1971 60hp Evinrude Triumph low RPM'S under load

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: 1971 60hp Evinrude Triumph low RPM'S under load

SS....need a little info here. How long ya' owned this engine? Is this a new problem or inherited one?<br /><br />Tell ya' what to do.....First get some compression readings. This is just to make sure the cylinders are in good shape.<br /><br />Do a spark check. Each spark should jump at least a 7/16" gap with a hot blue white spark. If any don't, need to figure out why and repair.<br /><br />Do a good look over of the fuel lines. Any hard ones. If so, remove them and replace with new. Hard hoses lose their grip and can suck air. Same with the fuel line from the tank.<br /><br />Have any idea how long it's been since the carbs have been over hauled? If you don't know, may be a good thing to consider.<br /><br />Got a manual? If not....do yourself a large favor and get one. Will help you immensly (sp?) a lot.<br /><br />If you got questions...don't hesitate to post.
 

sockey sally

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Joined
Jul 27, 2004
Messages
10
Re: 1971 60hp Evinrude Triumph low RPM'S under load

I just bought it. how do you do a compression test It could have been a long time since the carbs were rebuilt. I don't have a manual.. any ideas on where to get one.
 

micemjim

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Joined
Aug 5, 2004
Messages
5
Re: 1971 60hp Evinrude Triumph low RPM'S under load

i have the same engine with close to the same problems,we rebilt the carbs. when doing compression check take all plugs out ground engine ,test each cylinder/trun engine over. we were loosing spark at different rpm's we found the recterfire was bad and replaced it.takeing the boat in the morning hope we sloved the intermitting spark problem. hope this helps mick 162
 

Jeepmankev

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Joined
Apr 11, 2010
Messages
2
Re: 1971 60hp Evinrude Triumph low RPM'S under load

SS Did you discover your problem with bogging down during load? I have a 1970 Bonito with the same Evinrude motor you have and I too am having this problem. What was the resolution on it?

Thanks
Kevin.
 

JohnFox

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Joined
Mar 19, 2010
Messages
8
Re: 1971 60hp Evinrude Triumph low RPM'S under load

My dad was having the same problem with a 1960ish Johnson 5.5. He replaced the coil and it ran like it was new. Not sure if anyone can back me on this as I don't know a heck of a lot about boat motors.
 
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