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Old 07-26-2015, 04:02 AM   #1
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Default First time out and WTH happened!?

Been struggling with starting an outboard motor. Got some good info from forums which helped out a great deal. Replaced the fuel line from the tank to the motor today. Fuel line was quite hard and the primer bulb was deteriorating badly. So I took the boat (1989 Maxum 1700 w/ Force 85) to the river to check and be sure I could get it started and everything was good. So far it was. Wife and I took the boat to a Lake about 40 minutes away for our maiden voyage together. Got it unloaded and started great. Putted around a little then opened her up. She seemed to do well. Lake was pretty choppy though and we were bouncing all over. Not too big a deal. Well then all of a sudden the motor just quit. It would crank good but nothing. I heard what sounded like backfiring from the carbs or something. I don't know for sure. Kinda like a popping but from air. If that makes any sense. Looked at the motor and it was HOT and smoking some. Is this normal? I'm brand new to boating and don't know what to do. Traded my motorcycle for this boat and the guy we got it from knows boats and had it out a few times before we got it. Hoping I didn't screw something up. HELP!!!
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Old 07-26-2015, 04:52 AM   #2
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Sounds like the bouncing knocked an electrical ignition connection loose. How many cylinders does it have?

I am not up on outboards so I cannot think of something more spefic than that.

Question when it was running did you notice a stream of water coming from the telltale pisser hole? This will tell you the impeller is good. If was not the motor will overheat and anything bad can happen.

Get yourself a manual for the motor and read up.
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Old 07-31-2015, 03:29 AM   #3
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Well looky here. Now hoping that the overheat didn't fry piston rings and I can get her started again. ImageUploadedByTapatalk1438309745.018441.jpg
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Old 07-31-2015, 03:41 AM   #4
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Did you find all the broken off vanes? They can travel throught the cooling passages and get stuck causing heating issues.
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Old 07-31-2015, 04:40 AM   #5
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Going to try flushing it tomorrow. I feel like it's been like this for a while. There are some melted rubber pieces behind the pissholes in the leg. Going to get as much as I can out. ImageUploadedByTapatalk1438313967.595687.jpg
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Old 07-31-2015, 04:53 PM   #6
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danimal, welcome to club. Some of those force motors had a recall on the ignition coil. I got stranded in my dad's 1700 when the coil died. Standard trouble shooting for any motor, check for the three big needs, 1) Fuel (Mixed 50:1 with TWC-3); 2) Spark - Crank the motor with the plugs out and see if you have spark. 3) Compression - are your compression numbers in spec?

Once you have verified which one is missing, we can plot a path forward in your troubleshooting.

Keep us updated

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Old 08-10-2015, 04:32 PM   #7
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CounryME, did a comp test and got 90, 50, 65. Pulled the head and cylinders look good. You can still see the cross hatching from a previous hone it looks like. Had spark but not sure how strong. Don't have a tester for that. I grounded the plug to the block and cranked the motor. Blue spark. That's the extent to that test. Probably going to siphon the fuel tank and put fresh mixed in.
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Old 08-10-2015, 04:57 PM   #8
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Danimal, those compression numbers are not good. Normal should be 120psi. With compression as low as 50 and 65, you will be unlikely to get those cylinders to fire and the one at 90 may be the only one that fires. You may need to determine the low compression cause. Based on your story and the appearance of the cylinder walls, I would suspect your cylinder heads may have warped. Some places can do a glass plate test see if you are sealing. It may be time to enlist professional help.

Sorry the news isn't better.

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Old 08-10-2015, 05:17 PM   #9
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Being that the head isn't real thick, I can see this happening. I took some sandpaper lightly across the gasket surface to clean it up some by hand. Very little pressure. I planned on using a sharpie to mark the surface and take it across sandpaper again on a flat surface. I'll see where I get to after this and that will help me determine if I begin a rebuild or not.
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Old 08-11-2015, 04:36 PM   #10
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I did lay the head on my wife's granite island top and put light behind it. It is warped in the center. Not sure how bad yet. Going to get feeler gauges and a steel ruler to check.
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