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The issues are all significant. If any more questions please consult your Yamaha dealer or the experienced service shops.
It is believed that premature engine failure and related issues are linked to a manufacturing or design defect in the coating of the exhaust components.
Yamaha 300 hp outboard problems. Mercury and Yamaha have a long history of collaboration particularly in the development of four-stroke outboard engines in the 30-60 HP range. Jim I sent you a couple of photos of what looked like a new 27 Guardian MD registration with a pair of 300 HPDI engines on it. Yamaha 300 HPDI issue - need HELP.
RunningOnEmpty Maryland USA Posts. August 2020 in Boating 1. Hi i heard some of you on this site may have some knowledge with Yami 300 HPDI.
I have twin 300s with the updates done back in 2005. I have owned them since 2018 with virtually no problems. Ive got a 300 HPDI thats given me years of trouble free operation that started to act up on the last trip above 4200rpms.
Engine would not reach full rpm5600-5800rpms trimmed all the way up and would misssurge above 4200rpms. Engine would not bog down and die just had a clear and distinct miss above 4200rpms and would occasionally surge. It is believed that premature engine failure and related issues are linked to a manufacturing or design defect in the coating of the exhaust components.
Allegedly this defect allows hot gases to corrode the exhaust passages which in turn can lead to holes in the passages and can eventually cause a loss of horsepower smoking and engine failure. Interestingly CruiseCraft ensured the new 300hp rating included twin installations. So that means even twin Verado 150swhich are far from a lightweight combocan be hung from the aft end.
With the formalities out of the way we departed Manly Harbour looking for some open water to let our test Explorer 685 and 300 Yammie stretch their legs. Are you looking for good advice about your Yamaha outboard engine problems and issues. All you need to know about your outboard engine issues and good advice from your fellow boaters.
From outboard engine and electrical and electronics systems to engine and alarm issues tilt and trim issues this is the place to find information. Check the fuel lines connecting the outboard motor to the fuel tank. If any breaks or leakages are found immediately stop use of the outboard motor and take it to the shop for repairs.
If gummy or watery fuel is found have the fuel tank drained by a Yamaha dealer to remove any contaminated gasoline. Little wonder we have seen not just a horsepower race in recent times but also a technology battle between the key players of Yamaha Mercury and Suzuki. In the 225hp to 300hp outboard engine size range Yamaha is the latest to strike incorporating into its upgraded V6 engines much of the high-tech wizardry it introduced in 2018 with its.
Oct 27 The Best 300 HP Outboard. When you are looking at a new 300 HP outboard with a 20 midsection you only have two manufacturers to choose from. Mercury Marine and Suzuki.
When we look closely at the features and options in the 300 range it is apparent this is one of the reasons Mercury Marine has continued. The first step in this process is to start the engine and disconnect the fuel line. Then let the engine idle until it runs out of fuel.
Next place a rag under the carburetor and open up the carb drain screw. Once all the remaining fuel has drained away the engine can sit for several months without any issues. The issues are all significant.
I belong to a couple different outboard forums. I will provide you with a link so you can read up on the issues with this engine you will notice that the problems are all over the board. Give me one moment to to find a foum on the engine in question.
A problem in the fuel compression or ignition systems can cause poor starting loss of power or other problems. This basic troubleshooting and possible remedies and covers all Yamaha outboard motors. Therefore some items may not apply to your model.
If any more questions please consult your Yamaha dealer or the experienced service shops. We blew up a 30000 Yamaha 300 Outboard Motor. Yamaha 300 HPDI Outboard Review and Test.
The Yamaha 300 HPDI outboard is worthy of a test and review even in this day of four stroke dominance because this is one two stroke that packs a heck of a punch and will be of interest to anglers. V6 42L 300 hp. Our 42-liter F300 is a reliable offshore favoriteand its only getting better.
It now features a fresh new cowling design with stern light if rigged with Helm Master EX new integrated digital electric steering rerouted exhaust for enhance reverse thrust and is available in Yamaha gray or pearlescent white. The problem was that the outboard motor company had 300 motors in inventory. Rather than simply scrapping them Kiekhaefer had his employees repair the motors and sold them to a company called Montgomery Ward.
They were so impressed they ordered more. Now Mercury Marine makes outdoor motors that have a horsepower range from 25 hp to 400 hp. The latter is more than.
Yamaha Outboard Starter Troubleshooting and Replacement. If playback doesnt begin shortly try restarting your device. The F350 has a couple of things that are common to cause problems.
First and foremost is model year of the engines your inquiring about. For the most part there were three common things with these engines. One of which is the flywheel balancer separating.
Yamaha just did a campaign which replaces the ECU and Flywheel. Personally I would avoid the 350s. The issues are real and although they have supposedly been fixed in later models Yamaha had to extend warranty and promise to replace flywheels as necessary and some folks had to have that done several times.
The loose flywheel issue could lead to major powerhead failure. The old adage If it aint broke dont fix it certainly applies to Yamahas F250 and F300 42-L V6 outboards which boast a warranty claim rate of a mere 3 for all of the V6 Offshores sold since 2014. So when Yamaha decided to update them for 2021 they didnt touch the block and instead decided to simply add some of the.
Recently the BoatUS Consumer Protection Bureau has been made aware of dozens of reports regarding serious corrosion problems in Yamaha outboards specifically 2000 to 2004 first-generation F225 models. Over time the issue usually surfaces after 500 to 700 hours of use the engines exhaust gases appear to corrode the exhaust tube and. The Yamaha V6 outboards covering from 225 to 300 horsepower are some of the most popular powerplants on the market and with good reason.
Whether youre walking the docks at the Fort Lauderdale International Boat Show walking the floor at the Fred Hall Show or just walking through a marina youll notice that there are Yamaha V6 42L outboards all over the dang place. Watch our Yamaha Outboard Fuel Pump Issues video above in which we guide you through an outboards fuel system to troubleshoot possible issues that may be causing fuel pump problems. Although were using a Yamaha 250HP motor as an example the fuel system will be very similar on any modern outboard regardless of brand or model.