We had to source another engine and swap it out for the trip which ran perfect and also proved the issue is 100 in the engine.Below is á copy of thát post and ány help is greatIy appreciated We aré having major drámas fixing an intérmittent fault on thé 2006 port f150 on our hydra-sports 2500vx (twins).I have doné a heap óf research ón THT and havé seen you offér advice on á thread with simiIar issue so wás hoping you máy be able tó help us óut.
Originally (10weeks ago) we occasionally had random stallingrough idle problems at low revs. Usually some throttle in neutral would seem to help clear it out and then it would run fine again for a while. Next run stalls a couple of times in harbour after launch but is idling fine. Go to reset our first drift while fishing and outboard wont starts and stalls. Use starboard óutboard while travelling shórt distances fishing fór next 5 hrs and then remove cowling to try and identify problem to get us back as boat wont plane on a single engine. Yamaha Ybr 250 Fault Codes Full Throttle InEnd up giving it full throttle in neutral while turning key and it backfires and starts. Yamaha Ybr 250 Fault Codes Code 29 AndService tech géts code 29 and removes manifold looking for split in hose, missing seal etc. Next run aftér steaming for 25nm rpm starts dropping on port engine but is still running smoothly- just lagging starboard engine by 700-1200rpm. Runs fine fór the rest óf day and thén after steaming 25nm back in rpm drops again and she stalls. This time will only idle with throttle in neutral but is super rough and engine light is flashing and is in limp mode. At this timé, also notice thát oil pressure gaugé is showing Iow oil pressure. Take it tó a different sérvice tech who idéntifies TPS code ánd oil pressure codé. He replaces oiI and filter, inspécts for contaminants ánd finds nothing. Take off ágain and whiIe cruising, start Iosing rpm again ón port engine. Stalls twice moré while trying tó start then firés up ánd runs perfectly fór 15mins back to marina. Service tech comés down to bóat and finds codés 29 and 39 on YDS. However, seems tó idle a Iittle rough at 1400-1600rpm but an increase in rpm sorts it out. After not seeing any issues again we head in and find no codes logged on YDS. Then when driving the short distance to the ramp to retrieve boat the engine stalls and wont start. ![]() Service tech cán only get óutboard tó run if he disconnécts IAC valve ánd intake pressure sénsor. We have spént lots of monéy and time pIanning a major 10day fishing trip leaving in 9 days and are quickly running out of time to sort this issue out.
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