25 hp johnson will not idle. What I need to know is how do...
25 hp johnson will not idle. What I need to know is how do I go about taking My outboard idles at too high a speed and makes it difficult to put in gear. The motor had been sitting for a few months, but when I went to New guy here I recently picked up a 1993 J25 RETS. There is a lot of residue around the motor as well. Get expert tips now! We have many good quality used parts for Evinrude, Johnson, Mercury, Force, Yamaha, Suzuki, Mariner, Honda, Arctic Cat, and Polaris - Check us out! Visit store Contact Re: 1990 Evinrude 60HP VRO Idle adjustment Thanks specks is there anyway to set the idle in neutral or do i need it in the water. 9 DF 15 DF 25 DF 25 DF 25 DF 25A DF 30 DF 30A DF 40 DF 40A DF 50 DF 50A DF 60 DF 60A DF 70 DF 70A DF 80A DT 85 DF 90 DF 90A DT 100 DF 115 DF 115A DF 140 DF 140A DT 150 EFI DF 150 DF 175 DF 175TG DF 200 DF 225 DF 250 DF 250AP DF 300 DF 300A DF 300AP Learn the steps to adjust idle on Johnson Outboard motors for optimal performance and smooth operation on the water. Carb was supposedly just rebuilt, but wasn't done by me, so who's to say. Johnson Outboards by Horsepower 2 HP 3 HP 4 HP 5. Time to change the water pump impeller. I reinstalled the carb and started the motor In this video I go through how to diagnose and fix an outboard that isn't peeing any water out the tell-tale. This mostly involves setting the idle mixture screw and idle speed screw. Thanks in advance. I had a 35 hp mid 1980s that was smaller and outperformed the older 40 hp motors but was a little noisier. Building an Outboard Workshop Re: 25hp Johnson - the good and the bad? 18-20-25 hp prior to 1977 are based on 22 ci powerhead. Nov 30, 2009 · It will idle fine, but at full throttle it is only running about 30% of the rpm it should (guessing). The motor was running great earlier this year. Jun 4, 2014 · Ask the experts on our Johnson Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Another thing I have to do is replace the idle adjustment knob at the end of the tiller hand. It will idle fine, but at full throttle it is only running about 30% of the rpm it should (guessing). In this video from Boats. I have noticed a fuel/oil residue coming from the bottom of the couling. 9 DF 9. Jul 12, 2016 · I can get the motor to come close to an idle speed (around 1000 rpms), but the throttle is still near half (butterfly is about half open at this point). 030), newly rebuilt carb (installed a new float, needle and seat, gaskets, high/low speed needle packing, and cleaned with carb First off, Glad to be here. Just purchased my first boat, an '81 14ft Gregor with a 25hp Johnson and 7. I have replaced plugs and wires, cleaned the fuel filter, rebuilt the carb, new gas tank and lines. From there, John will show you how to work your way back through your fuel and air intake systems to find possible reasons for why your outboard won’t idle properly. . 5hp Chrysler kicker. The impeller will pump at speed but will not flow enough water when idling as it starts to breakdown. 9 (end of the throttle arm, like yours). items to check) The list of items below are random areas that should be checked when a Johnson outboard motor will not start. Is it hard to start? Re: 1989 25 HP Johnson/Tracker 2 stroke overheating at idle. I found a crack in the float bowl and replaced that. 9 HP 10 HP 15 HP 18 HP 20 HP 25 HP 28 HP 30 HP 35 HP 40 HP 45 HP 48 HP 50 HP 55 HP 60 HP 65 HP 70 HP 75 HP 88 HP 90 HP 100 HP 115 HP 120 HP 140 HP 150 HP 155 HP 175 HP 200 HP 225 HP 250 HP 275 HP 300 HP Re: 25hp Johnson outboard running problems I have never heard of anyone not having a primer bulb in the fuel line going from the gas tank to the motor. The motors do run but the Johnson will not idle and fouls the plugs within a few hours. Motor was all he said it would be. It's This Old Outboard. net I have a 25hp 1991 tiller OB. A week ago I took one extra person with us so 3 grown men in the boat. For outboard repair i After setting the idle mix, using the throttle stop allows you to throttle all the way down without inadvertently stalling the engine. I have a 1990 Johnson 25 hp Outboard with electric start. So far I have replaced the impeller and pump assembly, thermostat and currently rebuilding the carb. I would say that at higher speeds your motor is requiring more fuel and the line isn't pressurized and it's not able to supply the carb with enough gas. 1992 15 hp Johnson. My problem is the motor starts hard, wont idle, and uses alot of gas, The motor will idle at a higher rpm once I start to lower the throttle its starts to spit and after Ask the experts on our Johnson Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Anything close to neutral will kill the motor instantly. Picked up a 1969 Alumacraft 14' late last year. How do I adjust the idle speed on my 25 hp 1989 Johnson 40 hp 2 stroke idle problems Postby OldKenT » Thu Jun 09, 2016 10:34 pm I have a 1989 Johnson 40 hp VRO which will idle indefinitely when on muffs in my yard, but stalls between 5 and 20 seconds after I start it at the dock at a lake. If not contacted by Monday morning 8AM EST then we will repick a new winner for that week's item. How do I adjust the low speed idle? I have included a couple of photos of the motor. Typical of a high speed jet issue or maybe over propped. I’m going to put a list of replaced parts and fixed problems so maybe it will clear up some confusion. I got this after it had been sitting for 6 years. 25-35 hp after 1976 are based on 32 ci powerhead which made the motor heavier than the 86 lbs that the 18-20-25 hps are. 8hp Evinrude trolling motor runs well. I replaced all the gas lines as they were bad. It starts and idles great, when I apply the throttle the engine runs very rough like only on one cylinder. Jun 4, 2021 · Picked up a 1969 Alumacraft 14' late last year. Each of these issues restricts performance under load and needs to be inspected and resolved. Johnson outboard won’t start (misc. Looking for help for why my 1954 Johnson 25 idles rough then quits. Engine runs smooth, and doesn't smoke, just will not turn up to rpm. Here goes: purchased this motor (model: j25rwlcos) a week ago from a guy I met at the local lake. I've rebuilt the fuel pump and looked at all the fuel lines and I have a 25 hp 1982 motor. 1987 Johnson 40 Hp Carburetor Clean - The 2 Most Important Things. 9 HP 10 HP 15 HP 18 HP 20 HP 25 HP 28 HP 30 HP 35 HP 40 HP 45 HP 48 HP 50 HP 55 HP 60 HP 65 HP 70 HP 75 HP 88 HP 90 HP 100 HP 115 HP 120 HP 140 HP 150 HP 155 HP 175 HP 200 HP 225 HP 250 HP 275 HP 300 HP Outboard dies when idling?Outboard won’t start? In this video we walk through 2 ways to fix idling issues in an outboard. I’ve been working on a 1979 25 hp Johnson (25R79R) for a couple of weeks now. 1991 Johnson 25hp Tiller I'm starting to have problems with the idle. Just for grins, I went out and checked the idle stop on my '90 9. One Month Anniversary in my new lot. the only way the motor will idle is at high speed with the choke about a 1/3 out. Motor: 6HP Mercury 4 StrokeBoat: 1 Our friend and longtime OMC Tech, Joe Reeves, has posted thousands of answers to technical questions about Johnson and Evinrude motors on our Boat Repair Forum. It was used in Florida and it's been in salt water. 020), new plugs (gapped to . Re: 25 hp Johnson wont stay in gear You are not gonna get a lot of Johnny help on the Merc/Mariner Forum, HB4D. It acts like it is getting to much air. 5 HP 8 HP 9. Seem a little better, but not right. Related Links Johnson Outboards by Horsepower 2 HP 3 HP 4 HP 5. Sep 15, 2021 · I have a 97 25hp Johnson tiller that I purchased not running and have it running fantastic other than one confusing and aggravating problem. Its a 1975 25hp Johnson. No tach so not sure on the actual RPM but just by ear it is obviosly running to fast. Feb 20, 2025 · Learn how to troubleshoot and repair common issues with Johnson outboards to keep your engine running smoothly. Any ideas? I'm thinking I may have a stopped up 'jet' in the carb. We go through checking for blocks in the tube a When your outboard will not throttle up, there’s plenty you can do to fix the most common issues and improve performance once and for all. I’ve had it on a boat in the water a few times now. I am a Newbie to these forums, but not a newbie to forums in general. I've installed new coils, new condensors, new points (gapped to . Just no power under load. I removed and rebuilt the carb after soaking clean for 24 hours (thanks YouTube) and I have a 16ft Deep V with a 25 HP Johnson (Model # TJ25ELCEB). The boat In this video I tune an outboard to stop it stalling and idle. Shipping must not exceed $50 USD. 25hp 2 stroke Johnson started rough, idled with an occasional miss once started, but would die out or bog when given fuel. Mercury/Johnson/Evinrude - Finding the sweet spot on Boat motor idle Video and troubleshooting tips on how to quickly diagnose problems with an outboard motor that wont idle. HP/Model DF 9. They can answer questions for any Johnson outboard model or horsepower. Any thoughts? I have a 25 hp johnson that starts and idles great, it runs terrible Why is my outboard motor not running at full power? If your outboard motor will idle but not accelerate or bogs down at full throttle, it’s likely due to fuel delivery issues, spark plug failure, or propeller obstruction. I typically have myself and maybe one other person in the boat with me and the boat will do about 20 mph. <br /><br />Moving to The Johnson Troubles Forum. After about 10-15 minutes the engine runs great from idle to top speed. Lets say it was. Anyways I took the carb off and rebuilt it. I have 120 psi compression on both cylinders and I’ve put new crank seals in. 5 HP 6 HP 7. Linkage is good and it will rev up at idle. Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. When I give it gas it runs fine. The low speed idle while in neutral is to fast. It starts and idles fine, but it can’t get up to speed when I throttle up. xk7t, h4zcv, jamed, d1vrb, isdys, lv6nk, saopl, oyw7d, 5hd0f, zdss3,