mercury inline 6 compression test|Performing Compression Tests : purchaser Start with a compression test.-----Then test the spark intensity on all 6 , must be able to jump a gap of 7/16".-----Inspect for missing bleed restricters at the intake ports.-----Did . Itapira; Faby, escort pernambucana para um sexo bem gosto.
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Anyone know what a good compression reading a 79 Mercury 115hp 2stroke inline 6 should be? Might buy it to replace my 88 115 if the test is good. Thanks! Doing a compression test on a late 1980's Mercury 115hp outboard. I will have several repairs on this motor. I ordered two new power packs. The engine had. does anyone know the average PSI reading for 1985 Mercury inline 6 cylinders, 2 stroke?. i did a compression test on mine over the weekend and this is what i got: #1 35psi .
Video on how we perform Compression tests on Outboard Motors. Key things to note is that you need a good compression tester. Cheap ones will not give you acc. Start with a compression test.-----Then test the spark intensity on all 6 , must be able to jump a gap of 7/16".-----Inspect for missing bleed restricters at the intake ports.-----Did . A leakdown test is a FAR better indicator of the CYLINDER'S health (cylinder, piston, and rings). Just to clarify, it gives very little information on the condition of bearings. Dual Mercury Master Technician - for Mercury . I ran it with the low elevation jets for several years. This spring I rejeted trying to get the performance I had in MN. After rejeting it doesn't seem to do any better. I did a .
Performing Compression Tests
Basically the compression is the same with all of em. There are SMALL differences in compression based on several factors: 1. sometime in the late 70's Merc lowered the piston . Then came the compression test. 115-120lbs in 1,2,4,5 & 6 cylinders. #3 is a dead hole. looked inside with a small light, no hole in the piston. I don't know for sure why, it shares . I've just bought our first boat Swiftcraft 4.7m with a Mercury 115 inline 6 1982 model. The motor idles rough and misses but will accelerate o.k, but will also miss when rev higher up. . Mercury 115 rough idle and missing 1982 inline 6 Compression test shows 120 on all chambers give or take 1 or 2 psi. I didn't replace the float, needle and .
We did a compression test on our '66 inline 6 and have a few questions about the results. We got 140psi on all cylinders and no change after squirting in some SAE 30 oil so we concluded the rings were OK. I also suspect the valves and head gasket are ok since all the cylinders are the same. No Idle - 1989 Mercury Inline 6 115hp The compression is a bit over the map, and it could be due to a little extra carbon buildup from the 'leaky' carbs. A de-carb using Seafoam, Yamaha Ring-Free, OMC Carbon Guard, Chevron Techron etc would clean up the innards real good and ensure the rings aren't sticking from carbon issues.
1350 inline 6 mercury. Jump to Latest . Good strong spark (7/16"gap jump) from all 6 leads. Then came the compression test. 115-120lbs in 1,2,4,5 & 6 cylinders. #3 is a dead hole. looked inside with a small light, no hole in the piston. I don't know for sure why, it shares the middle carb #4 cylinder so I think that rules out a bad reed valve BTW - That motor is an inline 6. B. Boatpro Recruit. Joined Jul 10, 2010 Messages 1. Jul 10, 2010 #6 Re: 115HP Mercury 1974 Compression Test your engine is no good. Rebuild or trash it. . 115HP Mercury 1974 Compression Test Thanks for helping me you guys! I bought a new compression tester and my reading is 125, 123, 126, 119,122, and 121 .Basically the compression is the same with all of em. There are SMALL differences in compression based on several factors: 1. sometime in the late 70's Merc lowered the piston dome height on ALL inline 6's in an effort to make em not so prone to piston burning. 2. Mercury Mariner Outboard Forum . 1979 1/2 Mercury 115hp inline 6 low compression . 1979 1/2 Mercury 115hp inline 6 low compression. Thread starter uskr005; Start date Aug 24, 2013; U. uskr005 New member. Aug 24, 2013 #1 . After rejeting it doesn't seem to do any better. I did a compression test and found 68 - 70 psi on all 6.
Im looking at a 1985 Mercury 115 inline 6 to purchase. It is a fresh water engine very clean. $ 1000.00 I just need your input on these old engines Good or Bad. Expensive replacement parts or not. 125 compression on all cylinders Thanks Note the approximate number of compression strokes required to obtain the highest reading. 5. Repeat the check on each cylinder cranking the engine approximately the same number of compression strokes. Test Conclusion The indicated compression pressures are considered normal if the lowest reading cylinder is within 75 percent of the highest. I own a 1986 Mercury Inline 6, I had an overheat in the #3 cylinder and that cylinder stopped firing. . Switch box Help - 90hp inline 6 You had best test compression, since you overheated. #3 cylinder is prone to damage, followed by #1. I. Imjus4u2nv Seaman. Joined Jun 10, 2013 Messages 57. Nov 4, 2013 #6 Re: No Spark on Odd Cylinders, Switch .
Re: Octane for Mercury inline 6 owners Inlines were designed in a time when octane at the pump was higher. When I last took a compression test of one of my inlines it had 135 lbs in a couple of cylinders which is really pushing it for 87 or even 89 octane since 145-150 lbs is generally accepted as the max for 91-93 octane fuel. I have a 78 or 79 mercury inline 6 115 HP with low compression on 4 (about 40 psi). All others have around 120. I am showing some milky substance around carb and plugs. So I had a mechanic come take a look. . Guy came over did compression test and good compression on all but #3 and #4 like 45 psi. He said looks like a head gasket. 1985 Mercury 90 HP (Inline 6 CYL) Full Throttle no Power no Plane (Video Included) . running on 3 or 4 cylinders.-----And they do sound great in the driveway like that.-----So post the results of a compression test.----Does it have spark on all 6 leads or just 3 of them.,-----If it has a plugged carburetor you can do serious damage to 2 .
A compression test will let you know if the hard-to-diagnose misfire (or rough idle) condition or no-start condition is due to something wrong inside the engine (like worn piston rings or worn cylinder head valves). . Mercury Mountaineer). You can find the 4.0L Ford Ranger (Mazda B4000) engine compression test tutorial here:The Mercury Verado 300 can be used in single- and multiple-engine installations. Mercury Verado: The Big Picture. The concept driving the new Verado Series is to offer a compelling amount of power by means of displacement, fuel .Captain's reports and/or test numbers for this model are archived. . Mercury Marine’s Verado 350 is the highest output FourStroke model in the standard (non-racing) Verado line. It dispenses 350 horsepower from its 2.6-liter in-line six-cylinder block, with some considerable help from a supercharger and an advanced engine computer. .
Just doing a quick compression test on a 1985 115hp Mercury Outboard Motor. Be sure to post any comments or questions!If you liked this video and it helped . Re: 75hp mercury what is too low of compression? A fw years ago my son's Merc 115 HP inline 6 had a scored cylinder; we got 118-120 PSI on the 5 good cylinders. The bad cylinder was, of course, shot. Incidentally, I was able to get the gauge on all 6 cylinders; I've forgotten how I had to hold my mouth to get to one. This is a 1989 Mercury 115hp oil injected outboard motor mounted on a Starcraft 1700ls. A full compression test of all 4 cylinders as well as it starting, ru.
1979 Mercury 115 HP, inline 6 carb help. Thread starter biggjohnjeremy; Start date Apr 26, 2017; biggjohnjeremy Cadet. Joined Apr 26, 2017 Messages 21. Apr 26, 2017 #1 Hello everyone, today I have bought my first boat. Its a 1979 as far as I can tell with a 115hp Mercury inline 6. The "tower of Power" I have come to find out. 8. If your readings are below standard (not within factory specifications), perform a wet test. A wet compression test will temporarily seal the piston rings and possibly raise the compression. 9. Obtain a can of fogging oil and spray the perimeter of the cylinder walls and pistons. After the oil has been applied, retest that cylinder. A. " I own a late 60's early 70's mercury 100hp inline 6 with thunderbolt ignition. I have several questions. First, I had a compression test done last year.. results were poor compression in one cylinder, less than 50psi. the other 5 were fine. I know this will effect engine performance, but is there any way to gauge how much hp I am losing? Re: Mercury 1150 thunderbolt questions Take a compression test. If you have 100+PSI and the compression is even across the cylinders, the motor is fine. Post back results. You probably should clean the carbs on that motor as well as sitting for 2 years will gum them up. Impeller change out is a must as is change of gear oil.
Outboard Motor Compression Test: Inline 6's
Re: 82' 115 inline 6 idle speed/adjustment? Full throttle RPM should be around 5300 / 5500 rpm on one of those.----Possibly too much pitch on the prop.-----Idle would be around 800 rpm in nuetral and 650 in gear.-----Before you start adjusting do a compression test.----Then make sure there is spark on all 6 that will jump a gap of 3/8" with ease.-----Then again it could .Clymer Repair Manuals for the 1972-1989 Mercury Outboard Inline 6 are your trusted resource for maintenance and repairs. . water corrosion of gear housing bearing carrier and nut / Storage / Complete submersion / Engine flushing / Tune-up / Compression test / Spark plug plugs / Lower unit and water pump check / Fuel line service / Fuel pump . Mercury MerCruiser Sterndrives & Engines . Mercruiser 165 6 Cyl. . That family of engines from the 60's to the 90's or so was probably the best inline 6's ever built. ( 230/250/292 I-6 ) . do a compression test on the engine, from memory, 140 is spec, min is a 100. range of all cyl. within 20psi + pressure test the drive to 15 psi. it . First, the new 300-hp Verado is a 4.6L naturally aspirated V8. This compares to the 350-hp Verado, which is a 2.6L supercharged in-line 6. So, the two engines are night-and-day different – one relying on the supercharger to pack in air, and the other relying on large displacement. There are many other differences, as well.
Mercury Inline 6's, 90, 115, 140 Hp? [Archive]
compression tester gauge bounces
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mercury inline 6 compression test|Performing Compression Tests