chrisbmichigan
Cadet
- Joined
- Sep 12, 2012
- Messages
- 25
First off I would like to say hi to all forum members! My name is Chris and I am new to the forum.
I have been an avid boater and fisherman all my life. I have owned 4 boats. 3 of which ran so well I never really need any service on them except for regular maintenance. I now, on boat 4, want to start doing repairs for myself instead of spending a ton of money in labor costs at a repair shop. I am mechanically inclined and have purchased a service manual for the the new boat I just got.
Its a 1979 Aquasport Family Fisherman with a 1984 150 Johnson VRO....stole it a $1000 at auction. The glass, transom and stringers are all in great shape. I did have a lil history on the motor as a few repairs were done before it went up for auction.
Repairs I have done are 2 new starting coil packs, fuel primer solenoid, thermostats, water jacket gaskets, pressure relief valves, gear lube and new plugs and a decarb.
The carbs were rebuilt and it also had a new rectifier....so here comes my problem......
I have had conflicting stories and what the compression should be. Online says anything less than 100 PSI budget yourself for a rebuild....I have 90 PSI in all 6....but then 2 Johnson/Evinrude repair shops tell me the 90 PSI is good as these motors only had 95-105 PSI brand new from the factory...who should I believe????
After doing the above repairs I go to fire it up...first turn snap, she fires right up....I make an idle screw adjustment and get her down to 900/1000 RPM with muffs.....I let her warm up a lil and I put her in forward and reverse with no problem. After running for about 10 minutes the tach starts jumping, the engine begins running rough and she stalls....I turn the key several times and she fires back up but is running so rough that I have to keep the control lever at fast idle, if I drop it back in neutral she dies......If I let it sit 10 minutes or so it fires right back up and runs great until she gets warm again and than it stalls out....
Fuel line and primer bulb are good, has good gas, fuel filter is new, carbs rebuilt, doesn't appear to be a fuel delivery issue......HELP!!!!!!!
On a side note, I found this interesting, I doubt its the problem but a friend said it could be as the charging system is overworking its self and I am losing power when warm......The battery is shot....I charged it for 2 days and its only holding 1/3 of a charge....if I turn the fish finder on I am at 11.7 volts and with the motor running I am at 12.0 volts. I know the battery needs to be replaced but is the charging system working properly???? Is the battery cell that low that I can't charge above 12.0 volts? Could this be my stalling problem...the battery? Doesn't seem like it could be but could I be wrong? Thank you in advance for any imput.......
I have been an avid boater and fisherman all my life. I have owned 4 boats. 3 of which ran so well I never really need any service on them except for regular maintenance. I now, on boat 4, want to start doing repairs for myself instead of spending a ton of money in labor costs at a repair shop. I am mechanically inclined and have purchased a service manual for the the new boat I just got.
Its a 1979 Aquasport Family Fisherman with a 1984 150 Johnson VRO....stole it a $1000 at auction. The glass, transom and stringers are all in great shape. I did have a lil history on the motor as a few repairs were done before it went up for auction.
Repairs I have done are 2 new starting coil packs, fuel primer solenoid, thermostats, water jacket gaskets, pressure relief valves, gear lube and new plugs and a decarb.
The carbs were rebuilt and it also had a new rectifier....so here comes my problem......
I have had conflicting stories and what the compression should be. Online says anything less than 100 PSI budget yourself for a rebuild....I have 90 PSI in all 6....but then 2 Johnson/Evinrude repair shops tell me the 90 PSI is good as these motors only had 95-105 PSI brand new from the factory...who should I believe????
After doing the above repairs I go to fire it up...first turn snap, she fires right up....I make an idle screw adjustment and get her down to 900/1000 RPM with muffs.....I let her warm up a lil and I put her in forward and reverse with no problem. After running for about 10 minutes the tach starts jumping, the engine begins running rough and she stalls....I turn the key several times and she fires back up but is running so rough that I have to keep the control lever at fast idle, if I drop it back in neutral she dies......If I let it sit 10 minutes or so it fires right back up and runs great until she gets warm again and than it stalls out....
Fuel line and primer bulb are good, has good gas, fuel filter is new, carbs rebuilt, doesn't appear to be a fuel delivery issue......HELP!!!!!!!
On a side note, I found this interesting, I doubt its the problem but a friend said it could be as the charging system is overworking its self and I am losing power when warm......The battery is shot....I charged it for 2 days and its only holding 1/3 of a charge....if I turn the fish finder on I am at 11.7 volts and with the motor running I am at 12.0 volts. I know the battery needs to be replaced but is the charging system working properly???? Is the battery cell that low that I can't charge above 12.0 volts? Could this be my stalling problem...the battery? Doesn't seem like it could be but could I be wrong? Thank you in advance for any imput.......
