Turn the engine the opposite direction until the points are fully open and set the gap at. If you have just fitted new contactbreaker points, set them to approximately the right gap with a feeler gauge. Timing can not be properly set using the conventional method. Original issue dated june 2002 publication number 3610 3. Mercruiser engines with thunderbolt v ignition mercruiser 2. Mercury mercruiser 6641600b bravo transom diesel or gas 6641600b bravo transom assembly magnum bravo magnum transom used with 350, 357, 377, 383, 5. Owners manuals to easily access an owners manual with consolidated information specific to your mercury engine agree to the terms and fill out the form below. After setting the points, you should check the distributor timing, follow this procedure. How to set point gaps on a mercruiser alpha 1 gen 1, 140 hp 3. Getting the best gap between the points is essential for engine performance and reliability. The correct setting for the points is given in the car handbook or workshop manual.
Service manual number 26 general information 9086291 march 1999 page 1a5 engine serial number locations 71559 a b aserial number plate bstarter motor propeller information refer to the propeller section in appropriate mercruiser sterndrive service manual, or order publication 9086144, what you should know about quicksilver. Remove the engine hood cover and all panels that interfere with engine removal. Mercruiser points and condensers, direct replacement tuneup boat parts, distributors, spark plugs, rotor, condensor and other mercruiser boat parts. Set the breaker point gap for the 3horsepower and 4horsepower colt, with an 18 mfd to 22 mfd capacitor, to 0. Keeping your engine well tuned will improve performance and save fuel.
Jul 25, 2016 if the gap is within the allowable range usually 0. You may find some or all of these symbols used in the manual. Model point gap spark plug gap timing mark on spark occurs firing order int. If it will not tick over steadily, check the cause s and rectify any faults. Mercury outboard motor points, condenser, tune up parts.
Mercruiser parts, sterndrive information, tools, manuals. Do not disconnect battery cables while engine is running. Set point gap and dwell classic car restoration club. When setting the points gap on one side of a multi cylinder magneto, it is not uncommon to find the size of the points gap on the other side is different. In depth video on points and condenser and complete ignition system tune up, on older engines that use points and condenser, before the newer magnetron elect. The engine should not be dtscult to lift with a proper hoist. Mark simpson takes a close look at how the points work and explains how theyre installed, then shows how to properly set the point gap and the dwell. Mercury mariner ignition points diagrams, breaker points, and repair manuals. That is used to clean off any film that might be on the contact points.
Spark plug gap point gap point dwell point spring tension ac r42ts champion rv9yc. Although differing in displacement, these engines are essentially the same design with many interchangeable parts. Aug 22, 2011 point gap at roughly 20 thousandths will get you in the ball park. Installing and setting points on johnson ldl10 5 hp. I know i have the service manual for that some where. Jul 14, 2020 to time the points to the ignition coil, you adjust the gap between the points.
Continue to turn the engine over until they begin to close again. Coast guard rules and regulations to minimize risks of fire and explosion. For boat owners who are installing an atomic 4 engine to replace an existing engine of. If it is, stop lifting, lower the engine back onto its mounts and make sure the engine has been completely separated from the boat. Install the points turn the engine until the the points rubbing block are on one of the high spots on the distributor shaft set the gap. Current passing through the contacts burns away one of them and deposits a peak of metal on the other. Mar 05, 2010 install the new points and slowly turn the engine over by hand until the points start to open. Page 38 timing must be set using a special procedure as outlined in the appropriate section of this manual. Mercruiser points and condensers for sale at go2marine. Refer to the mercruiser repair manual as procedures can differ depending on model and year. Im a relatively new boat owner and a true novice at engine repairmaintenance. To order a printed version of the service manual for your particular mercury outboard or mercruiser engine, click here. This service manual uses various symbols in order to describe different service operations. Omc stringer stern drive ignition tuneup specifications.
Set up your dwell meter and hook up a remote starter. Most classic cars do not have electronic distributors, but rather rely on a set of points to trigger the ignition system. Mercruiser boat tune up, cap, rotor, points and condenser. Download service manuals mercury suzuki yamaha johnson. Setting the timing advance at full throttle, 1985 25hp. Usually when adjusting point gap you turn the crankshaft until the points are open as wide as they will go and set the gap. Apr 30, 2018 your dwell, and thus your points gap, needs to be set before you get out the timing light. Turn the engine over a few times and recheck the gap. If your maximum point gap after setting the points to open right at 3. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. How to set points on a small block chevy it still runs. The spark plug gap adjustment should not be changed more than 3 times and should not exceed. As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to register for an account.
Mercedesbenz ponton ignition point gap adjustment and vacuum. Then it stops because the points are so badly burned they cant perform their function. This engine is identified by many model numbers like. The proper setting for points is determined by dwell, and measuring the dwell with a meter on a running engine is much more accurate than simply measuring the static breaker point gap. In some owners manuals, the ac 41993 spark plug used in 496 and 8. Most gap points for chevy smallblock engines require. These engines are used with the following mercruiser models. Fitting and adjusting contactbreaker points how a car works. Breaker points repair help for johnson evinrude outboards. Getting the dist cam lobe to a peak to set the points is hard to do, it is easier to rotate the rotor a little to get it on a peak then hold it, to check the clearance between the point contacts, its actually easier to do it with the dwell meter, remove the rotor, connect the dwell meter, put a screwdriver in the adjustment slot, and use another screwdriver to loosen the two screws a little. Top selling items for your 1982 mercruiser 140 01406002 mercury marine. Thunderbolt v ignition system service manual number 25 page 4b2 9086281 november 1999 replacement parts warning warning electrical, ignition and fuel system components on your mercruiser power package are designed and manufactured to comply with u. Clean the fuel pump filter screen and check fuel line connections. I did a quick search in the forum but didnt find a quick answer, what should i set the gap.
To set the dwell, remove the distributor cap and rotor, ground the coil wire and remove all the spark plugs from the engine. However, static gap is usually reported as a starting point, so you can get an. Need firing order for 1973 mercruiser 888 doityourself. Turn the crankshaft pulley in the direction of the engines normal rotation with a spanner or socket wrench, until the contact heel is on the tip of one of the distributor cam lobes, so that the contactbreaker points are fully open. Your dwell, and thus your points gap, needs to be set before you get out the timing light. Adjusting mercury outboard points, cleaning and resetting mariner points, set mariner breaking points, cdi breaker points, set mariner points timing, points replacement, set points on mercury outboard, set outboard point gap, replace points on mercury outboard. Use the distributor adjusting tool or the proper size allen wrench to make the adjustment on the newer model chevy distributor. The meter reading should stay steady at a steady engine speed. Do not adjust the point gap again or you will mess up the timing. Mercruiser boat tune up, cap, rotor, points and condenser diy. Although not ideal, this in itself is not a major problem see our points bounce page for the reasons. Start engine and allow it to run for several minutes at idle speed. What is the spec for a mercruiser 170anyone with a manual help. Points gap the magneto guys vintage, veteran, classic.
Alternatively, put the car in top gear and push it forwards a short distance. Always check the spark plug gap before installing any new spark plug. With the dwell meter connected, start the engine and let it settle to a smooth tickover. Mercruiser engines equipped with pcm555 and ecm555 efi mercruiser engines equipped with visteon efi obdm compliant sterndrive inboard gasoline marine engines.
The contact heel which is moved by the distributor cam wears away, preventing the points from opening. Use a dwell meter to set the point gap and you probably wont need to set the timing. Set the breaker point gap for the smaller 2horsepower, 2. Spark plug gap timing mark on spark occurs firing order int. Performing a complete tuneup can often take care of nagging running and starting problems. Mercruiser parts, sterndrive information, tools, manuals and. K341 points gap engines redsquare wheel horse forum. A special procedure must be followed to adjust idle rpm. Consult your authorized mercury mercruiser dealer before attempting this procedure.
Place the wheel chocks in front of each rear wheel and behind each rear wheel. Jun 30, 2005 well it took a little bit of looking but i found my old mercruiser service manual. To view this site, you must enable javascript or upgrade to a javascriptcapable browser. Points and condenser setupwiring, setting gap, cleaning. Set the points too wide and the spark plugs dont get enough juice your engine whimpers. Dec 09, 2008 platinum spark plugs in a mercruiser 4.
Remove the distributor cap and inspect the contact points. Park the ferguson te20 on a flat surface and turn the engine off with the transmission in gear. Fully tighten the points mounting screw after achieving the adjustment. Ideally, check and set the gap, between every major service, and replace the contact breaker after 6,000 miles or 10,000 km, or twice a year. Set them too close and the engine works fine for a few miles. Magneto stator plate has slotted mounting holes and should be turned as far clockwise as possible to obtain correct ignition timing of 30 degrees btdc. Timing must be set using a special procedure as outlined in the appropriate section of this manual.
This is usually put down to wide manufacturing tolerances. Ideally, check and set the gap, between every major service, and replace the. Im sure the procedure for setting points may be found in many workshop manuals, but having done this job countless times in the twentyodd years i have been. Apr 25, 2010 i even tried putting a spark plug on the coil wire itself and turned it over. So i am going to replace my plugs on my 2004 bayliner 285s 350 mpi spark plugs. The information provided on these pages is correct to the best of my knowledge, however the mastertech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. The sticker on the spark arrestor calls for a gap setting of.
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