carb adjustment on 87 xr2 150 merc?

blackhawks21

Recruit
Joined
Jun 10, 2006
Messages
4
Is there any carb adjustments for low idle, seems to run alittle rough, motor shakes at idle. also how can I lift motor to remove/rebuild broken trim motor in down position?
 

studlymandingo

Commander
Joined
Mar 22, 2006
Messages
2,716
Re: carb adjustment on 87 xr2 150 merc?

Welcome to iboats. A couple of things you may want to try first off. <br /><br />Decarb with Sea Foam or similar product.<br /><br />Test your spark with a spark gap tester.<br /><br />Use the red "SEARCH" button above and do a search on these terms, you will find a wealth of information here.
 

Conn

Cadet
Joined
Apr 29, 2006
Messages
27
Re: carb adjustment on 87 xr2 150 merc?

on my xr2 150, there are no adjustments, only the jet sizes. pickup a manual if you don't already have one. I've been through my carbs twice in a month chasing idle gremlins. I'm new to the boat thing as well, but have picked up very quickly thanks to iboats and my manual. <br /><br />while its running rough, squeeze your primer bulb to force fuel to the carbs. if it idles worse, it's getting fuel. if it idles better, change your fuel pump and filter. <br /><br />the low speed jets might be a bit clogged. run a potent mixture of seafoam through it (remote fuel tank, 1 gallon or gas, 1 can of seafoam) and let her sit for a while to free up that junk.<br /><br />I've still got a low idle running problem as well that's driving me bonkers. Those were the steps I went through first. I'm thinking i've got a rich oil mixture causing mine, as the pressure in the remote oil tank is still high, even several days after i take the boat out of the water, and it smokes worse than an old freight train. <br /><br />My tilt/trim has a lever on the left side of the housing that i think is a "lock" to hold the motor up while you service. tilt up, hold the lock in place and trim down to rest the motor on the lock....this may not be right, but it's the only thing i can think of as to why it's there. doesn't seem functional for anything else. <br /><br />Hope this helps. <br /><br />Conn
 

blackhawks21

Recruit
Joined
Jun 10, 2006
Messages
4
Re: carb adjustment on 87 xr2 150 merc?

Originally posted by studlymandingo:<br /> Welcome to iboats. A couple of things you may want to try first off. <br /><br />Decarb with Sea Foam or similar product.<br /><br />Test your spark with a spark gap tester.<br /><br />Use the red "SEARCH" button above and do a search on these terms, you will find a wealth of information here.
 

blackhawks21

Recruit
Joined
Jun 10, 2006
Messages
4
Re: carb adjustment on 87 xr2 150 merc?

Thanks for the info. Conn. I apperciate it! My tilt motor is broken in the down position , how do I relieve the hydraulics to jack up the motor, so I can remove the trim motor?I've got a good good auto mech. working on my carb issue's I'll let you know how it all turns out.
 

studlymandingo

Commander
Joined
Mar 22, 2006
Messages
2,716
Re: carb adjustment on 87 xr2 150 merc?

Have you gotten to the bottom of your idle troubles yet?
 

Arty_G

Cadet
Joined
Jun 10, 2006
Messages
14
Re: carb adjustment on 87 xr2 150 merc?

I have a 83 v150... on the front of my trim pump, there was a flat-head screw. If you back out this screw, it should let air into the lines, and let you lift the motor. Be careful, those 150's are very heavy... I wasn't able to pick mine up. You might need some type of hydraullic jack to tilt it.<br /><br />Good luck
 
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