Hi all,
Lookin for thoughts. Here's the backstory. I took my 1982 Johson 90hp with Jet leg into the shop to get a new impeller/liner/shaft/bearing. Costly work. Well, I expected it to be there for a week but the supplier screwed up and it ended up taking a month to get my boat back. It was a very rainy and humid month while it sat outside, and the vent was open on my gas tank.
First time out with the new impeller, I got goin and it was running beautifully at close to 5000 RPM. After 3-4 mins, the RPMs started surging up. This lasted about 5 mins, then it leveled out and ran consistent at 4400 RPM for the rest of the run, which was about 20 mins.
My guess is that I got condensation in my tank while it sat outside. It ran great at first until it used up the good fuel in the line, then surged as it started taking on the bad fuel, and leveled out with the consistent flow of bad fuel. Does it sound like I'm on the right track? Is it possible this would cause acute damage to my motor?
I always use ethanol free fuel, but I didn't have any stabilizer in it as I didn't think it would go bad in that amount of time. Maybe I was wrong?
I did add stabilizer before the run as it was going to be my last one of the season but looks like I'll be headed out one more time with new fuel and everything cleaned up.
Also, I cant find a fuel filter on this motor besides the screen on the fuel pump and whatever filter sits in my gas tank. Is it possible there isn't one?
Thanks
Lookin for thoughts. Here's the backstory. I took my 1982 Johson 90hp with Jet leg into the shop to get a new impeller/liner/shaft/bearing. Costly work. Well, I expected it to be there for a week but the supplier screwed up and it ended up taking a month to get my boat back. It was a very rainy and humid month while it sat outside, and the vent was open on my gas tank.
First time out with the new impeller, I got goin and it was running beautifully at close to 5000 RPM. After 3-4 mins, the RPMs started surging up. This lasted about 5 mins, then it leveled out and ran consistent at 4400 RPM for the rest of the run, which was about 20 mins.
My guess is that I got condensation in my tank while it sat outside. It ran great at first until it used up the good fuel in the line, then surged as it started taking on the bad fuel, and leveled out with the consistent flow of bad fuel. Does it sound like I'm on the right track? Is it possible this would cause acute damage to my motor?
I always use ethanol free fuel, but I didn't have any stabilizer in it as I didn't think it would go bad in that amount of time. Maybe I was wrong?
I did add stabilizer before the run as it was going to be my last one of the season but looks like I'll be headed out one more time with new fuel and everything cleaned up.
Also, I cant find a fuel filter on this motor besides the screen on the fuel pump and whatever filter sits in my gas tank. Is it possible there isn't one?
Thanks
