Re: 89' 70 horse Johnson power surge
Welcome to iboats!<br /><br />Definitely sounds fuel related. Either your gas, or if your gas is fine, how your engine is getting it or the lack thereof. Check the simplest things first... Do you have internal or external gas tanks? If external, then make sure your vent is open. I've had them vibrate shut before, and the engine has trouble getting gas then. Is your fuel fresh? Look for a clog in your fuel line by pushing the ball on the connector end that goes to the engine. If your fuel bulb is pumped tight, then gas should squirt out fine. New fuel filter wouldn't hurt either. If all that doesn't help, then spray some carb cleaner in your carbs. There may be some plugging there. Keep us posted.<br /><br />Jeff
I just returned from the lake from the very first trip on my boat. I have a Johnson 70 horse outboard (1989). All was going great up until about 20 minutes into our ride when the motor began to go through something that is difficult to describe. It began to have power that would come and go. It never died out completely, but would have power that would last 1 or 2 seconds, it would then die for about the same amount of time and then instantly run for another second or two. It continued back and forth doing this for 15 minutes until I got back to the dock. The only thing I have done is replace the plugs and gear oil prior to taking it out.
