Question about Mercury Mariner

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When looking at the starter on a older(76?)mercury 7.5 hp outboard does it rotate clockwise? Will not fire. Has spark and gas to carb throat but think it is not reaching plugs. Cannot detect suction at carb port after removing carb and holding thumb over port. There is a strong outward air pressure through the small port.Got a feeling something is backward in the ignition. Worked perfectly until I removed the starter to repair rope and it hasn't ran since. I have heard it fire thgrough the exhaust a couple of times.

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  • rwebber12 Jul 27, 2009

    Thanks kirkx for suggestion. I thought something like that but needed confirmation. Since found some .pdf's on those valve's and will have a look soon.Here is an awesome link to excellent quality Mercury manuals available for free. http://forums.iboats.com/showthread.php?...

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  • Mercury Master
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Almost sounds like the exhaust valve is stuck open.

Posted on Jul 25, 2009

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1 Answer

Diagram spark plug wiring


my guess, is you removed them and didnt mark them?
the firing order?
what engine, there are 5.

to do this , one need to know 5 things.
2.5L, 2.8L, 4.0L and 5.2/5.9L engine displacements.
the distributor rotation direction CCW, or CW
and last the firing order, sometimes marked clearly on the intake manifold.
you must now where #1 cylinder is (always most front)
1989-98 2.5L Engine firing order: 1-3-4-2 Distributor rotation: Clockwise
2.8L Engine firing order: 1-2-3-4-5-6 Distributor rotation: Clockwise
4.0L Engine firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise
5.2L and 5.9L Engine firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise
on a v6/v8 one cylinder is more forward. this is #1, look carefully.

Nov 26, 2013 | 1997 Jeep Grand Cherokee

1 Answer

Spark plug wiring diagram for 05 tahoe


Greg Bernett 2821 Solutions February 14, 2010
You didn't post your engine size so please pick the applicable diagram:


37926a4.gif
1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise


8c292b0.gif
1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise



30ced3d.gif
4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise


de67664.gif
4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)


bf80c63.gif
5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Source: spark plug wiring diagram for 98 tahoe

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    ledsled378 2926 Solutions July 24, 2010

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01f93b7.jpg ..............................

Source: Need diagram for spark plug wiring for 1997 Chevy

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    Dennis Weid. 44272 Solutions September 16, 2008

This was all I could come with, hope it helps.



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Feb 27, 2013 | 1998 Chevrolet Tahoe

1 Answer

Have 67 Ford Mustang GTA 289V8. How do spark plug no. layout on engine left side is 1-3-5-7 and right side of engine is 2-4-6-8. Would that be correct and what is firing order?


The 67 289. Right (passenger) side, 1-2-3-4, left (drivers) side 5-6-7-8. Firing order, 1-5-4-2-6-3-7-8 cc. This should also be cast into the intake manifold in front of carb. Also, dist rotation is counter clockwise as your looking at motor from front, and #1 should be at approx 1 Oclock position. Most dist caps will have it marked.

Oct 20, 2010 | Ford Mustang Cars & Trucks

2 Answers

Firing order for 1990 Chevy Caprice V8 305


look on intake front side it will tell you the firing order

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2 Answers

What order do the wires go on the distributor cap


You didn't post your engine size so please use the appropriate diagram:


71f6763.gif

GM (Cadillac) 250 (4.1L) V8 .GM (Cadillac) 273 (4.5L) V8 .GM (Oldsmobile) 307 (5.0L) V8 .GM (Oldsmobile) 350 (5.7L) V8 w/EFI.Engine firing order: 1-8-4-3-6-5-7-2 .Distributor rotation: counterclockwise



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GM (Buick) 252 (4.1L) V6 .Engine firing order: 1-6-5-4-3-2.Distributor rotation: clockwise



23d7821.gif

GM (Cadillac) 368, 425, 472, 500 V8.Engine firing order: 1-5-6-3-4-2-7-8.Distributor rotation: clockwise



c614b2b.gif

GM (Cadillac) 429 V8.Engine firing order: 1-8-7-2-6-5-4-3.Distributor rotation: clockwise

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2 Answers

Spark plug wiring diagram for 98 tahoe car is missing need to know which wire goes were


You didn't post your engine size so please pick the applicable diagram:


37926a4.gif
1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise


8c292b0.gif
1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise



30ced3d.gif
4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise


de67664.gif
4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)


bf80c63.gif
5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Feb 14, 2010 | 1998 Chevrolet Tahoe

1 Answer

Need fire order,spark plug wires replaced in incorrect place


For several engines....

1aa520f.jpg

Fig. 1: Buick-built 231, 252 V6 Engine firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise


863ec48.jpg

Fig. 2: Olds-built 260, 307, 350, 400, 403, 455 Pontiac-built 265, 301, 350, 400, 455 V8 Engine Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: Counter-clockwise


575110c.jpg

Fig. 3: Buick-built 350 V8 Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise


d2d7f9f.jpg

Fig. 4: Chevrolet-built 267, 305, 350 Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: clockwise


fbcd2cb.jpg

Fig. 5: Chevrolet-built 262 Firing order: 1-6-5-4-3-2 Distributor rotation: clockwise


Hope helped with this (remember rated this help) Good luck.

Nov 05, 2009 | 1985 Oldsmobile Delta 88

4 Answers

78 corvette that has not been started in 3


1.) put aside about $50 that you are ging to spend... period
2.) drain the oil and remove the old oil filter
3.) install a new oil filter, add new 30W oil
4.) remove all 8 spark plug wire from the 8 spark plugs
5.) remove the 8 spark plugs
6.) spray about 5 seconds of WD40 into each of 8 spark plug holes
7.) spray the remainder of the can into each of the 2 valve covers thru the EGR holes (pull out the EGR valve first)
8.) making certain that you have a full battery charge, turn the starter switch to START for about 5 seconds... if your engine turns then your internals are not frozen... that's good
9.) open another can of WD40 and spray equal amounts into ecah of 8 spark plug holes a second time
10.) turn the start switch on for another 5 seconds and listen for strange sounds... by the way without the spark plugs the engine will rotate more quickly than you normally expect... not a problem because as it turns it is lubricating your internal parts
11.) wait a minute and then turn it on for for about 10-20 seconds while listening for scraping or knocking sounds... if none heard then you are all lubed up and ready to reinstall the spark plugs.
Install new plugs or sandpaper the old with the correct gap ( I believe .035")
12.) if you didn't mark the plug wires not a problem... Google '78 Chevy Distributor Firing Order to find terminal #1 on the distributor cap... usually about the 1 o'clock position
13.) install #1 wire to #1 sparkplug... the driver's side front closest to the radiator
14.) the distributor rotates like a clock (clockwise) and the numbers on the clock starting at #1 is 1-8-4-3-6-5-7-2.... this is the firing order in a clockwise direction
15.) take the next plug wire #8 and connect it to #8 spark plug
Note: the spark plug numbers are cast into the top of the intake manifold for easier identification
16.) conect the remaining wires to their respective plugs
17.) make certain that you have a full battery charge, some gas in the tank (gas evaporates over 3 years) and a full radiator.
18.) Turn the starter switch and listen for the engine to start
19.) If it doesn't start the first time, try again and wait for the gas to reach the carburetor.... try again
20.) if it still doesn't start spray some engine strating fluid into the carbuetor throat and try again... it should start
21.) if it starts but doesn't keep running then repeat step 20. unitl the gas reaches the carburetor and continues to run on its own...!

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3 Answers

1983 F250 will crank but not start


timing may be way off, distributor rotor may not be pointing at no. 1 distributor cap contactor when no. 1 piston is at top dead center. Also, confirm your spark plug wiring order on dist. cap is correct.

Apr 06, 2009 | 1983 Ford F 250

2 Answers

1994 Chevrolet s10 will not start. The starter, battery, and alternator are good. Could it be the eprom chip or a fuse or something else electrical?


its lack of spark, or lack of fuel. Dribble some fuel into the open carb throat whilst cranking, if it fires even once, then spark is ok

if you have fuel injection it could be a bad throttle body injector. Spray methanol from a squeeze bottle into the open throat, if it fires even once, then its lack of spark

Dec 19, 2008 | 1994 Chevrolet S-10

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