Outboard No Power Under Load. Approximately half throttle, it bogs a bit and seems to not be getting full power. No Power under Load - Yamaha Outboard Parts Forum Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, … Why is your outboard not reaching top speed? Maybe your boat has lost acceleration, top speed, or just seems to be down on power. to troubleshoot and tune a 2 stroke outboard motor it needs to be in the water and in gear. An outboard will rev all the way up without running on all cylinders. Engine Malfunction. If one carb was clogged, it is very possible that one or both of the others are partially clogged as well. 03-04-2011, 09:22 AM. New power pack, new head, new gaskets, carbs cleaned 4 times, New proper spark plugs (look perfect - like toasted marshmallow, no … Posts: 1. Troubleshooting Tips. You will also need to change your plugs cause if you have water up to the VS you have water hitting your plugs and they are bad. To stop this problem i simply … I've been having problems out of my 1995 Mercury outboard [accelerating under load]. Tangled Propeller. You will have to do this on the water, and … If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good examination. Whatever the cause, the only way to fix your fuel line air leak is to replace the damaged line. In the test tank it starts. Let’s take a look at seven reasons why your outboard won’t throttle up and how to fix them: Tangled Propeller; Poor Gas Quality; Clogged Fuel Filter; Fuel Hose Replacement; Faulty Impeller; Bad Spark … The first reason your outboard motor might lose power is because of the fuel consumption. 394 likes, 29 comments - Cooper Capital Specialty (@cooper_capital_salvage) on Instagram: "Tag a buddy that is looking for a lightly⚡️ zapped⚡️ 2019 26 . 06-18-2014, 08:58 PM. No power under load - Yamaha Outboard Parts Forum Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Corroded or fouled spark plug wires can also cause the outboard motor to sputter or lose power. This is done to prevent corrosion. Yes the fuel pump should be fine because the ball gets hard as a rock. Engine Repair and Maintenance Mercury & Mariner Outboards Motor will not accelerate under load. check for water in carbs. As long as I didn't ask more then that from her she ran for three hours without fault. When this happens your motor will start and idle just fine and even accelerate to … Tips and tricks to find the cause of your outboard emgine bogging on acceleration No power under load - Yamaha Outboard Parts Forum Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, … I've been having problems out of my 1995 Mercury outboard [accelerating under load]. Mixture Screws The first thing to check before anything else is the mixture screws. What you need to do next is pop a timing light on each of the spark plug wires one at a time, throttle the engine up, and see if the light flashes, or cuts out and stops. My thoughts on this deal is a bad power pack that only allows half speed while under a load. Mercury used to have a throttle control that connected the carbs that has a universal black nylon ball joint that has been known to pop out of the nylon socket. Get rid of this problem, and you may find that your engine’s performance returns to normal. #1. Absolutely do NOT ever ever ever run a two-cycle engine over 2,000-RPM while in neutral, not even for a brief second. The outboard starts first time only using a quarter of the pull rope, idles fine and happily s*****s along at a gentle *****ing speed, the odd backfire . check tank, fuel lines for gunk. Make an appointment and take it in…. You may have to register before you can post: click the register link above to proceed. Unhook the hose, loosen the screw on the body and tilt the motor to drain. You have spent the better part of $300 plus before you count your time. Again, you might need to idle home. The throttle movement from 3/4 to full did nothing under load, but [the engine speed . If your outboard motor isn’t running at its best, check the fuel vent on your portable tank to make sure it’s open. This should be the first thing to check if you’re having RPM troubles. Posts: 1. There are a few signs that your engine isn’t working as it should: Overheating Engine timing out Ignition not starting properly or bogging Burnt out spark plugs and coils Defective power pack or connections Crossed coil signal wires, can cause a damaged piston if not fixed In no particular order Engine Won't Reach Operating RPM. Take one of the wires out, inspect it and put it back carefully before you remove the next one. Turns out you need to drain the vapor separator on the rear of the motor. Hi guys, I have been wrestling with my outboard for a couple of months now with help from a mechanicaly inclined mate. I Show more Outboard revs increase but boat doesn't. Login or Sign Up Log in with With outboards, the rubber bushing inside the hub can begin to slip and fail, causing a loss of power. Propeller pitch or diameter, damaged blades 3. If your boat doesn’t have a portable tank, but instead an integral tank with a fuel vent that’s plumbed to the outside of the boat . NO POWER UNDER LOAD. - Yamaha Outboard Parts Forum General Discussion Yamaha Outboard Forum If this is your first visit, be sure to check out the FAQ by clicking the link above. [I] have rebuilt carburetors, put on new fuel lines and filter, cleaned [fuel] tank, added new gasoline, rebuilt the starter, ran engine tuner, and then put new spark plugs in, and [I] am still having the same . Practice changing props so there are no surprises, if you have to do it away from home. Tweet. Check each … Four carb kits, an ultra-sonic cleaner, a gallon of simple green “purple”, some fine brass wire, a compressor to blow out all the small path ways, and the better part of day or two to do the work. 2. Fuel condition. As long as this is not a mechanical issue and is due to gummed up internals this stuff should clear it out. Kill switch was not pulled and in the run position. "Finally Problem Solved - No P "Finally Problem Solved - No Power Under Load - Johnson 70hp. Engine timing out. Assumed Ethanol affected carb or small amout of gas left from previous year. The easiest way to do this is by eliminating the simplest explanation first and working your way outward until you locate the issue. The main relay is usually sealed with any potting material. I would attack the carbs. Sometimes, the hub only spins when the engine revs above a certain RPM, causing many boaters to wonder if they have spun a hub, are experiencing ventilation or cavitation, or have some kind of gear or power issue with their outboard. The first step is to identify what the cause of the problem is. Sal: jimh: posted 06-08-2007 09:11 AM ET (US) Can anyone help with this problem? 2003, Mercury 225 will get up on plane and do 5,000 rpms at start up with no problems. In no particular order Engine Won't Reach Operating RPM. Had the boat out today after some work to the carbs. Problem: My 2006 5 HP Mercury Outboard started easily and idled perfectly first trip this year. After about 15 minutes of operation the engine will lose power and revs only when a high load is put on the engine. There are a few signs that your engine isn’t working as it should: Overheating Engine timing out Ignition not starting properly or bogging Burnt out spark plugs and coils Defective power pack or connections Crossed coil signal wires, can cause a damaged piston if not fixed A spun hub feels like a loss of power with excessive RPM. I replaced the plugs but that did not cure the problem I have read the forums here and this is what i am going to check this weekend. ), ditto . hi there. Let’s take a look at seven reasons why your outboard won’t throttle up and how to fix them: Tangled Propeller; Poor Gas Quality; Clogged Fuel Filter; Fuel Hose Replacement; Faulty Impeller; Bad Spark Plugs; Malfunctioning Fuel Pump; 1. the outboard shops use special test props to simulate a normal load so they don't have to take the boat … No power under load. Besides, there might also be disruptions in the water intake hole for this. it's a 2 stroke characteristic. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L … Here are 10 reasons and fixes to help prevent lack of fuel to a 2-stroke engine. If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good examination. For example, when towing a tube and coming out of a circle, or when motoring through small waves or swell. That is your boat might start consuming fuel more when the load increases. Check each wire one at a time. start motor on muffs and remove one spark plug wire at a time to look for a drop in … 10-08-2015, 08:34 AM. Honda BF50 four stroke bogs after 3/4 throttle. There are a few signs that your engine isn’t working as it should: Overheating. New power pack, new head, new gaskets, carbs cleaned 4 times, New proper spark plugs (look perfect - like toasted marshmallow, no oil residue etc. Prevention: Consider carrying a spare … Under load, the tach begins jumping/bouncing around sporadically, jumping up to 5000 or 6000 rpms; however, the engine does not surge. My 2004 Yamaha 40hp outboard loses power when under load. Check the plugs to see if both look the same. Try tapping the choke button while it is struggling, this is also an indication of a fuel problem. Restricted fuel pickup tube or anti siphon valve Fuel System Test 4. Check 1. Next, if at all possible, try to run the engine off of portable Merc tank. Besides, there … With outboards, the rubber bushing inside the hub can begin to slip and fail, causing a loss of power. start motor on muffs and remove one spark plug wire at a time to look for a drop in rpm. It happens right around 1400 rpms. I must second Tom advice. Weak ignition wire insulation. I Show more Outboard revs increase but boat doesn't. If you have spark in all 6 cylinders . I … Posts: 1. Everything from fouled or corroded spark plug wires to debris in the gas can cause sputtering or loss of power. For an increase in fuel consumption, the motor stops working after a while. Defective power pack or connections. The first thing to check before anything else is the mixture screws. I replaced the plugs but that did not cure the problem I have read the forums here and this is what i am going to check this weekend. Burnt out spark plugs and coils. Before I used the boat last week the cranking battery was dead. A spun hub feels like a loss of power with excessive RPM. 30hp 2 stroke. Or is it only running on one cylinder, due to no spark (faulty coil, e. The first reason for this might be fuel consumption. I also noticed the tachometer bouncing on me a few times. at points with WOT it seems to try every few mins I hear a slight rpm change New plugs. i just got my motor back from a friend who is a outboard mechanic i brought it into him to get tuned up after . I’m definately mechanically inclined… Why is your outboard not reaching top speed? Maybe your boat has lost acceleration, top speed, or just seems to be down on power. Engine … NO POWER UNDER LOAD. As a result of this, your outboard motor would just lose power in any way. Tips and tricks to find the cause of your outboard emgine bogging on acceleration Reason 1: Increase in Fuel Consumption. It sounds as if it is not getting adaquate fuel and based on the age. #3. 3. It's extremely frustrating when trying to pull a skier up and the boat is jerking and losing power as it backfires. The most obvious answer is fuel. no power under load. Sal: jimh: posted 06-08-2007 09:11 AM ET (US) Should only take approx 10 minutes, or if really plugged up maybe as much as 20-30 minutes, for it to clear out. . You will have to do this on the water, and under a load. Fouled spark plug. Defects in the fuel injection system can also be the reason. A few of the parts that might clog the spark plugs including spark plug wiring are grease, gasoline, carbon, dust, and some other dirt. Then the backfiring, sputtering and popping starts right after the tach begins jumping. Login or Sign Up Log in with Go into gear and idle fine In idle will rev up fine However under load wont go past half power. i am a bit new to outboards but am mechanically inclined. The first reason your outboard motor might lose power is because of the fuel consumption. posted 06-04-2012 11:10 PM ET (US) I anticipated a nice ride from Morgan NJ to the Navesink in Rumson in the Montauk, [but the Yamaha 90-HP two-cycle outboard engine] acted up. When this happens your motor will start and idle just fine and even accelerate to a point before it bogs down. Checked plug wires and fuses, everything OK. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can’t see inside it. Reason 1: Increase in Fuel Consumption. In neutral with no load the engine will appear to run and rev normally even with one or more cylinders not firing. I was about to purchase a Suzuki DT55 outboard along with trading my 70hp when the seller asked if I had the title to my outboard. With outboards, the rubber bushing inside the hub can begin to slip and fail, causing a loss of power. And do not forget that this might also lead to internal issues too which loss of power. There are a few signs that your engine isn’t working as it should: Overheating Engine timing out Ignition not starting properly or bogging Burnt out spark plugs and coils Defective power pack or connections Crossed coil signal wires, can cause a damaged piston if not fixed If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good … The engine loses power or gets weakened out in idle. If your outboard motor will not throttle up, the issue may be as simple as a tangle. [The Yamaha 90-HP two-cycle engine seems to have] no power over 3,000-RPM. The motor will start up and idle fine. This situation causes misfire (no defined operating state) and hard starting. [T]he [VRO] pump has been disconnected. It is not a good idea to rev an outboard in neutral. Login or Sign Up Log in with Everything from fouled or corroded spark plug wires to debris in the gas can cause sputtering or loss of power. Cleaned carb and replaced, same problem. Idled fine prior and continued to idle fine, wouldn't die at idle RPM's. Under load, the tach begins jumping/bouncing around sporadically, jumping up to 5000 or 6000 rpms; however, the engine does not surge. Login or Sign Up Log in with The engine may run fine at idle and light load. Corroded Spark Plug Wiring Corroded or fouled spark plug wires can also … No Power under Load - Yamaha Outboard Parts Forum Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Simply twist it open and monitor your engine for improvement. Please refer to your owner’s manual for details on all maintenance procedures and troubleshooting for your specific model. If neither of those tests show where the issue is, then pop off the cowling and pump up the fuel ball. Replaced exterior tank, tank line w/bulb, filter and all interior gas . posted 01-26-2009 04:04 PM ET (US) [I] just got [a] boat [with] a 1989 Evinrude 150-XP on it. Photo courtesy of Attwood. Wouldn't rev to full power. Reason for the Problem: The fuel injection system failure may cause this. Loss of power under load? An answer? 03-22-2016, 08:21 AM. No power under load. i have a 1999 30hp mshx, 2 stoke, 3 cylinder. and I did try pumping ball while accelerating. ($16 each for the 200!) The first reason your outboard motor might lose power is because of the fuel consumption. Find an owner’s manual here. The timing adjustment bumpers however is not maxed out or bottomed out when the problem happens. Sal: jimh: posted 06-08-2007 09:11 AM ET (US) Everything from fouled or corroded spark plug wires to debris in the gas can cause sputtering or loss of power. I would rebuild the carbs. This 15 Hp four stroke has had this problem since new and we and the mechanics we have taken it to so far cannot find the problem. Idle is fine but when I [rapidly increase the throttle the motor] has no power and dies down. Well I'd just like to say that I finally solved the problem with my 1978 Johnson 70hp with no power under load. Type and Octane possibly old fuel 2. A few of the parts that might clog the spark plugs including … Mercury Mariner Outboard Forum . Mixture Screws. g. Ignition not starting properly or bogging. Idles and runs great with no load but as soon as we put her in the water she bogs down and loads up at just past 3/4 throttle. They can answer questions for any Yamaha outboard model or horsepower. So you will either need a helper to work the light, or to drive the boat for you. That means the motor might be running out of fuel. Let me know how you make out. Could not restart immediately. 1. Crankcase oil volume, high oil level can cause aerated oil and lifter collapse 5. ), new fuel pump, compression 120 on all 3 cylinders. Thread starter alexmatco; Start date Mar 30, 2015; A. If one cylinder is noticably different than the others, buy a compression tester and check it properly. was wondering if someone might be able to give me some tips. Electrical components inside the housing of the engine. Pumped ball. In this case, the engine runs fine until engine temperatures rise and there is an increase in workload. alexmatco New member. Have you done a compression check, if it was way down on one cylinder that would make it lose power dramatically. Installed new carb, same problem. Spark plugs as well as spark plug wiring that are clogged, rusted, or broken fail to provide the powerful spark required to start your boat motor. No Power under Load - Yamaha Outboard Parts Forum Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. But that would make the engine hard to start, presumably. Prevention: Consider carrying a spare prop, along with the necessary tools to make the swap. when you try to cruise at a steady 4,000 rpms or any steady rpms above 2,000 the motor starts to lose power after about 300 yards. The fuel air … Have you done a compression check, if it was way down on one cylinder that would make it lose power dramatically. This will verify if you have a fuel pickup issue in your tank. These are the reasons behind the problem. Tennman12 Mar 21, 2011 T Tennman12 Recruit Joined Mar 21, 2011 Messages 4 Mar 21, 2011 #1 I have a 1978 Mercury 500 50 hp thunderbolt. Carbs cleaned, fresh fuel, fuel filter cleaned, swapped coils (no change) any one any ideas could this be the CDI or Rectifier ? Thank you jstarzy. You will likely feel the prop slipping at high RPM. Mar 30, 2015 #1 need … Posts: 1. It's extremely frustrating when trying to pull a skier up and the boat is jerking and losing power as it backfires.


vhd eaj exd tlc ouw uyd jvl hyj ell ubf
145 981 123 116 686 127 267 156 164 756 510 143 687 737 710 541 144 821 848 754