engine question

[coolguy147]

well my friend has this outboard well evrything is working fine on it but i i was wondering cause if full throttle it while at idle speed it will kinda bog down and then it go to right rpm ranges so its ok but that bogging part is kinda bothering me yet if u ease it into wot it wont bog down at all its a fourstroke if this helps

 

[JB]

Re: engine question

4 Stroke outboard covers several hundred different engines, CG.

What causes hesitation on hard accelleration is different on most of them.

Care to give us make and model?

 

[coolguy147]

Re: engine question

i mean i dont no anyother way to describe it then bogging down cause like i really vibrates hard when we full throttle it and sorry not sure of the make and all that other stuff

 

[ondarvr]

Re: engine question

Seems we're getting a little more info every post. Bogging is much different than vibration or running rough and you'll get different answers for each issue. Call your buddy and find out what make, model and year it is, plus what exactly the issues are, this way everyone here will have a good shot at helping you get it back to running right.

 

[jay_merrill]

Re: engine question

It would also be useful to know what kind of a boat the motor is mounted on. The type of boat, length, approximate operating weight, etc. might provide clues as to the problem. If the boat has a tach on it, you should also state what rpm the motor shows at wide open throttle (WOT).

Absent any indication of mechanical problems, this sounds very much like a boat that is underpowered, or an engine that is overpropped. The initial "bogging down" and/or vibration, followed by a more normal operation of the motor, sounds like a boat trying to push through its bow wave on accelleration. The eventual transition to a "normal" sounding and performing engine, could just be that the boat has come up on plane. If this assumption is correct, the WOT rpm value will probably be at the lower end of the manufacturers recommended range, and might even be below it.

 

[coolguy147]

Re: engine question

its not overpowered guys and sorry i cant that info for u but hes out of town and well it does it in neutral too like he showed me when he revs it in the water im thinking that theres a lack of fuel cause he said it just recently started acting up whens its warmed up its fine but cold it will shut off on him once or twice and its kinda rouch idling idk i knows its 1 cylinder so r these always rouch idling yet still what could cause the bog down?

 

[jay_merrill]

Re: engine question

Actually, I said underpowered. That said, we still need more info. Its pretty hard to offer suggestions without knowing the details on the motor.