Could trim cause carb floats to stick?

v12mac

Chief Petty Officer
Joined
Oct 30, 2003
Messages
502
Here goes.<br /><br />I just purchased a 1979 Mako 23’ CC with a 92? Johnson 225hp, the bad news is it looks like this boat may have sat for along time…. Trim motor is completely desolved to dust! <br /><br />It fired right up and I ran great idle to wot so I bought it. Just to be safe I threw in 20 gal of pre-mix 50:1 while I observed the vro. <br /><br />I ran the boat 30min on Saturday until the hub spun. I then idled 10min to get to the beach to put on a spare prop. I used the relief screw to get the motor to tilt up. Put it on tested it 10min and went back to the beach. Then I used the relief screw to tilt the motor up again to check on the prop. Everything looked good, so I grabbed a beer and hopped in the water. <br /><br />2 hours later I couldn’t get the motor to run. I could get it to fire a few times but couldn’t keep it running. <br /><br />Bulb is firm<br />Put in new plugs <br />No Kill switch on this setup<br /><br />It will fire and run on a shot of starting fluid of a few seconds so I am leaning toward a fuel problem.<br /><br />Could tilting the engine up for the first time in years messed up the carbs / floats to the point of not running?<br /><br />The fuel line goes in to the motor with out a connection. Could the torque on the line have caused an already old line to crack and suck air? <br /><br />What direction should I start trouble shooting?<br /><br />Mac
 

Jack Shellac

Lieutenant Commander
Joined
Aug 7, 2002
Messages
1,661
Re: Could trim cause carb floats to stick?

My guess is that the carbs are all gummed up and need a thorough cleaning. A new carb rebuild kit would be in order, too.
 

v12mac

Chief Petty Officer
Joined
Oct 30, 2003
Messages
502
Re: Could trim cause carb floats to stick?

I am just baffled that it would run great all day then nothing….<br /><br />Mac
 

cjones4@hvc.rr.com

Petty Officer 2nd Class
Joined
Feb 8, 2003
Messages
132
Re: Could trim cause carb floats to stick?

I have a different engine but recently cracked a fuel line when tilting the motor up. I would investigate that carefully first. On mine - pumping the bulb with the cowl off showed the problem.
 

petrolhead

Chief Petty Officer
Joined
Oct 16, 2003
Messages
614
Re: Could trim cause carb floats to stick?

Running fresh fuel through the motor has probably dissolved and dislodged years worth of congealed crud, which is now blocking the carburettor jets.
 

v12mac

Chief Petty Officer
Joined
Oct 30, 2003
Messages
502
Re: Could trim cause carb floats to stick?

How do 6 carbs clog at the same moment?<br />Mac
 

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: Could trim cause carb floats to stick?

The same cruddy fuel goes to all 6 carbs. This has nothing to do with the trim.
 
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