1974 johnson 70hp bogging

raggy

Recruit
Joined
Jul 30, 2005
Messages
2
i have a 1974 70 hp johnson when i get it in the water and take off it starts to go then just bogs down. if i put it in nuetral and go back and throttle the motor up by hand in nuetral it revs right up. any ideas . thanks gary
 

DHPMARINE

Captain
Joined
Dec 16, 2003
Messages
3,688
Re: 1974 johnson 70hp bogging

Gotta do the basics: check spark,compression and fuel sample.Without that we can guess.My guess is time to rebuild the carbs.Anyone else ?<br />Not really trying to be funny,but this is what you need to do.<br /><br />DHP
 

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 1974 johnson 70hp bogging

I agree with DHPMARINE, time to overhaul carbs, remove and clean all jets.
 

chucko

Cadet
Joined
Oct 21, 2009
Messages
22
Re: 1974 johnson 70hp bogging

definately lack of fuel, weak pump, bad gas, vacuum leak in line, screen clogged?
 
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