Sfritr Posted April 7, 2011 Posted April 7, 2011 Ok Guys, you have never let me down before so here goes: Took the boat out for its maiden 2011 run. She started right up, water temps 48. I let her idle for about ten minutes to let it warm up properly. Got a good hole shot, ran about a mile and idled for probably 20 minutes. I fished for an hour with the TM and cranked up the motor to go back in. Again, everything was fine. About a half mile from takeoff she dropped from 500RPMs to about 3500rpms. At that point I threw her in nuetral and it sounded like I had lost a few plugs. By the time I got to the ramp as soon as I would put her in gear it would stall. Motor is a 96 Johnson 150. Never had an issue with the motor and just had a tune up last spring and ran fine all year. The gas had been filled and seafoam added before winter. I wanted to run it once to see if I should take her in for another tune up. Guess I will now. Thanks for the feedback guys. Could it be a bad fuel pump? Maybe just fouled plugs? Quote
Sfritr Posted April 7, 2011 Author Posted April 7, 2011 oops I meant 5000RPMs to 3500 (not 500) sorry Quote
GLADES Posted April 10, 2011 Posted April 10, 2011 On 4/7/2011 at 12:16 PM, Sfritr said: Ok Guys, you have never let me down before so here goes: Took the boat out for its maiden 2011 run. She started right up, water temps 48. I let her idle for about ten minutes to let it warm up properly. Got a good hole shot, ran about a mile and idled for probably 20 minutes. I fished for an hour with the TM and cranked up the motor to go back in. Again, everything was fine. About a half mile from takeoff she dropped from 500RPMs to about 3500rpms. At that point I threw her in nuetral and it sounded like I had lost a few plugs. By the time I got to the ramp as soon as I would put her in gear it would stall. Motor is a 96 Johnson 150. Never had an issue with the motor and just had a tune up last spring and ran fine all year. The gas had been filled and seafoam added before winter. I wanted to run it once to see if I should take her in for another tune up. Guess I will now. Thanks for the feedback guys. Could it be a bad fuel pump? Maybe just fouled plugs? You might have a fuel hose issue. I would replace all the fuel hoses with quality hose from the tank to the motor. Also replace the priming bulb. With ethanol added to gasoline, it causes some types of hose to deteriorate and delaminate internally so that when under load, it actually pinches off the hose and the gas flow. The same with the bulb. The check valves can fail. If you have an inline or canister filter, change that too. I would do all of this before taking it to a repair shop and spending lots of money. It has happened to me. By the way, changing a fuel pump is really quite easy too. Quote
Sfritr Posted April 11, 2011 Author Posted April 11, 2011 Gonna have some time on Wed to take a look at it. Hopefully I can figure it out so I dont have to spend the 95.00 per hour fee. The fact that it ran fine all day and suddenly lost power and sputtered makes me think it could just be a small fix. keeping my fingers crossed Quote
Chaz Hickcox Posted April 11, 2011 Posted April 11, 2011 Your water pump or thermostats are out and she is overheating. I had this happen about once a year with my '93 150 Johnson. The loss in power is the engine protecting you from blowing it. Quote
Sfritr Posted April 11, 2011 Author Posted April 11, 2011 The motor had a good pee stream even after it lost power. My temp gauges didn't go off but, I will check both before taking her in. Quote
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