2000 Johnson 225 1500 repair bill not fixed

[andyjwow]

Hi guys, so my boat wasn't getting past 1500rpm after I changed the carrier that holds the 2 seals that keeps oil in and water out of the lower unit. I was 99% sure I put it in right but mechanic said it was upside down preventing exhaust coming out. But after 10 hrs at 100$ a hour they found my bottom cylinder washed out so they changed my power head gasket and checked my carb reefs. They ended up putting a used carb on because they said mine was leaking. All ignition checked out I'm assuming. My no oil light was also,coming on so they unhooked it and I just mixed my gas oil. I drained all my gas when I got it back and added 6 gallons and took it out for a test run. It started and took off awesome. It actually went fast and higher rpm then the day I bought it. I drove for about 5 mins turned it off and fished for about 30 mins. I started it back up and it went into gear and when I hit my hot foot it tried to die like no gas. I tried 3 times then just babied the gas and it took off. Ran fine again at wot. Stopped rpm went below 1500rpm and it bogged down again like before I sent to shop. I just held wot on pedal for 20 seconds and it climbed to 1600 then 1700 2000 then planed out and ran fine. Turned off fished for a hour tried to start same thing tried to die like no gas. Put engine all the way down with exhaust in water and it didn't die but bogged at 1500. Pumped ball nothing different. Had partner lay on front deck and it started going up in rpm slowly and got past 2000 and took off again. In 8 hours and 20 different stop and goes maybe 5 times it took off with no bogging. 10 times tried to die before I could press gas and 5 times bogged at 1500 for 10-20 seconds and took off. If driving fine at wot and j dropped below 2000rpm and didnt turn it off half the time it would bog down and act up and the other half it wouldn't bog down.

 

[dingbat]

First thing I’d do is hook up a remote fuel supply and take it out for a spin to eliminate the fuel supply as your problem.

From there, replace fuel line from fuel pump to fuel rail with plastic tubing to check for leaks in the fuel systems

disconnectiong the oil warning isn’t doing you any favors. Fix the problem and put it back in service.

 

[andyjwow]

What's the fuel rail? I know there is a hose from pump then it goes to a 3 way I think then fuel filter to ball to tank. Or it goes 1 from pump to filter.

 

[Joe Reeves]

The carrier was upside down??? That may have been possible with the very first carrier (1968 55hp)but with a 2000 model? I find that hard to believe!

Your explanation... slow planing out... having your partner laying on the bow to get it down?? A thought... check the false bottom between the deck and the hull of that boat for water! May not be your problem but not something you would want to overlook.

 

[andyjwow]

So I took her out again today and put more gas in it because it was riding the E the first time. Never has it try to die or act like no fuel. Stopped and started about 20 times and the first 15 times no problems what's so ever. Was missing my partner but made sure that the live well in the back was full. I tried to make the engine hot by running and stopping about the 16th time it acted up. Started bogging down at 1500rpm engine was all the way down and exhaust was in water so I trimmed up a little nothing changed and trimmed back down and it started rising and planed out. It sounded rough the next few times but muscled through and hit 2k and I could trim up. Acted probably 2 or 3 times in a row after that but ended up taking off about 10 seconds into the 1500rpm being floored. I never had to put the engine so far down before and if it's not 100% down it won't go. I use to be able to just keep exhaust flat with water and it would be ok. But when it goes past 2k it goes faster than it ever did since I have had it for 3 years. Same prop and everything has a new lower unit though.

Should I get a hydrofoil? Change my plugs? I have a 1994 21x bullet. And i do not see the circle thing to unscrew to check bottom hull for water. I do have a leak somewhere because my bilge kicks on but I jack it as high as I can in the driveway with drain plug removed.

 

[SweetD]

Sounds like a carb adjustment issue to me. Inconsistent fuel delivery.

 

[andyjwow]

I installed a clear gas line from behind the filter and primer ball. I emptied filter and pumped the ball. I feel like my carb floats were full because as soon as filter got full the ball was hard. Half the hose has a huge air bubble in it about 4 inches long. I took hose off filter and primer the line full of gas before putting back on the filter. Spilled some gas doing this and couldn't get the air bubble out.
Is this air bubble common or is this why it's working some times and acting up others. Also I realised my boat idles at 2000 outside water now since getting back from shop from like 1k

 

[dingbat]

Is this air bubble common or is this why it's working some times and acting up others. Also I realised my boat idles at 2000 outside water now since getting back from shop from like 1k

there should be no air in the fuel lines while running. You need to find and fix the leak.

Idle is set @700 rpm in the water, in gear. Mine idles @ 1,250 on a hose.

 

[Joe Reeves]

On a flushette, the idle rpm should be set at:

20" shaft = 1000 rpm
25" shaft = 1200 rpm

In the water, the idle will drop to normal due to exhaust back pressure.

 

[andyjwow]

Thanks Joe and others. I'll check the other side of primer ball to tank tonight.