1150 carb removal

spargs

Seaman Apprentice
Joined
Jan 29, 2006
Messages
41
Hi guys, i have a 73 1150 Merc Blueband tower of power. I am finding that the engine is bogging down when attempting to accelerate under load. I figure a decent cleaning of the carb and distributor cap is in order.<br /><br />Two questions...<br /><br />1) What components of the engine will i need to remove to get access to remove the carbs? eg, starter motor etc.<br /><br />2) What product should i use to clean the distributor cap to ensure it is firing each cylinder properly.<br /><br />Thanks guys! (from aus)
 

MercFan

Petty Officer 1st Class
Joined
Dec 31, 2005
Messages
347
Re: 1150 carb removal

Disconnect battery<br /><br />I removed...<br />Shield<br />Cowling<br />Top Cowling<br />External skeleton/chassis (4 veritcal bolts in the back by Nr5 plug, 2 horizontal bolts at the front, down the bottom by the coil)<br />Choke solenoid wire<br />Ignition box wires ( 4 on the one side, 3 on the other)<br />Starter wire<br />Starter mounting top and bottom<br />Starter<br /><br />Makes life easier if you then remove the coil enitely with distributor cap and plug wires (As a assembly). On mine all the wires screw into the distributor, and it's a ***** to screw them out. Also you risk breaking one if you screw them back too tight.<br /><br />Remove all 3 caps + filters on the sides of the carbs. They havta be moved up and aside all at the same time.<br /><br />Loosen all 3 carbs, and start removing them from the bottom.<br /><br />Take note at Carb 2 how to turn and slide the choke lever back into position.<br /><br />If you are 2 people it's actually easiest to remove all 3 carbs at the same time and dis-assemble them on a table.<br /><br />Take pictures as you go along. The 3 carbs can't be mixed up so don't worry about that. Top carb has a pick-up, choke, and choke solenoid center.<br />Middle carb has a choke. Bottom carb doesn't have a choke.<br /><br />Best stuff I've found for carb cleaning is a 50/50 mixture of purple methilated spirits and gasoline/petrol. Then I use aerosol carb cleaner to spray into all the small channels etc. But I'm sure the other more experienced guys have something better.<br /><br />For the distributor cap I used a light sand paper to clean the pickups. Washed out with my carb cleaner. Electrical cleaner woulda been better I suppose. Lightly sprayed the inside with a water displacing spray oil (WD40). And just wiped the pickus clean again so there's not excessive oil on them.
 

Clams Canino

Commander
Joined
Jan 10, 2004
Messages
2,179
Re: 1150 carb removal

I'll add that I also run caps through the dishwasher when done, and then put a new carbon brush in them.<br /><br />-W
 

MercFan

Petty Officer 1st Class
Joined
Dec 31, 2005
Messages
347
Re: 1150 carb removal

Ah yes! I forgot that part!<br /><br />Distributor cap goes into the dish washer! Sounds weird, but it works! But I think you havta remove the plug wires then. Getting water under those booties might cause you a pain later.<br /><br />And that center black carbon brush is not a Merc part. Just take it with as a sample to your local automotive pirate part shop and get a new one :)
 
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