Engine Bogs down at full speed

[Aaron Mc]

I have a 98, 50hp johnson outboard When I go at full speed the engine bogs down and the boat will barely go. It seems to idle fine and does not die on me. I replaced the fuel filter, but it still does it. Any suggestions? I am 16 and this is my first boat

 

[PBF]

Re: Engine Bogs down at full speed

Do you have a tack? If it bogs down at exactly 2000 rpms the engine may be telling itself theres a cooling or oil problem (if you have a VRO unit that is). At least thats true on my Yamaha, I had the same problem and a lose quick connection to the block heat sensor was the source. Check these systems out and their sensors if so. Good luck.

 

[manowar]

Re: Engine Bogs down at full speed

I have yet to see some say to someone is your oil fuel mix ratio right since your a beginner always make sure your plugs could be fouled or the throttle cable is out of adjustment or your running on less cylinders than you have colis sparking? hope I helped

 

[Mikael-Block]

Re: Engine Bogs down at full speed

I just had the same problem on my marina 75 hp 1984.<br />It was the pump on the fuelhose. The litle ball inside was blocking when the hose was on the bottom of the boat. I lifted it and hang it on a hook, that worked.<br />Mikael