Any help would be appreciated

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09-14-2016, 10:39 PM
Micropterus salmoides

Any help would be appreciated

Been fooling with a small outboard (94 Yamaha 6hp) for months trying to get it perfect for my lil boat (12' weld-craft commercial).
Got it as close as I could. Starts on first pull every time. Wasn't expecting it to be runner, but was highly disapponted on its maiden voyage. Never got on plane with me n wife n unborn boy.
We had fun regardless and caught fish regardless.
Got home n went to fiddling…… I did find that when I primed the bulb on the tank, a stream of fuel was shooting from the fuel pump cover.
Never had any shutdowns or abnormal behavior when we went out but is it possible it was sucking air and not performing at peak?

Sorry for dumb questions. Fished since I could hold a pole but I've never had a motor.

Any help would be greatly appreciated.

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09-14-2016, 11:33 PM
Hanr3

Without hearing the motor run, its hard to answer your questions. I seriously doubt you will get on plane with a 6hp motor unless your in a canoe. I had a '1957 Johnson on my 14' Alumcraft and barely got over 6-7mph. The boat was only 4' wide. IF your worried about the engines performance, carb can be tricky, take it into a local shop this winter and let them give it the once over.

Congrats on the little one when the day comes.
09-15-2016, 08:43 AM
Clint

Quote:

Originally Posted by Micropterus salmoides

Been fooling with a small outboard (94 Yamaha 6hp) for months trying to get it perfect for my lil boat (12' weld-craft commercial).
Got it as close as I could. Starts on first pull every time. Wasn't expecting it to be runner, but was highly disapponted on its maiden voyage. Never got on plane <snip>

There are numerous reasons you did not get the boat up on plane. The first thing I would do is check the trim of the motor. There is an adjustment of the angle of the motor to the transom. Usually you have 4 or 5 notches to adjust the angle. Take it out with your normal load and try each position. You will find one that works better than the others. You may have to sacrifice hole-shot for top speed but that is normal with a limited HP engine.

Second - rearrange your gear. Move the weight around so the boat is balanced differently. Like the trim it may take a few tries to get it right.

Third is the boat itself. A deep VEE will need more HP than a flat bottomed jon to get up. If this is the situation you will have to learn to live with it or get a different boat.

Quote:

Originally Posted by Micropterus salmoides

I did find that when I primed the bulb on the tank, a stream of fuel was shooting from the fuel pump cover.

This may be just over pressuring the fuel pump. If it doesn't leak while running I would not worry about it.

Quote:

Originally Posted by Micropterus salmoides

Never had any shutdowns or abnormal behavior when we went out but is it possible it was sucking air and not performing at peak?

Possible but not probable. Being your first motor is problematic as you may not know what an outboard sounds like when it is wide open or idling as you have nothing to which you can compare.

And last but certainly not least is paying for a mechanic to go over the motor may be a good investment. He/she may see something that eluded you and preventive maintenance is ALWAYS cheaper than repair maintenance.

Good luck.
09-15-2016, 12:57 PM
Cray

You need to repair the fuel pump iregardlis if it causing a power problem. Last thing you need is a fuel leak under the motor cover. Should not leak period even if priming. That boat with 2 average size people is most likely not going to plain very much if any with that motor. The first two things Clint posted are critical in this situation.
09-15-2016, 07:18 PM
Barnacle Bill

Make sure you have the motor mounted properly. The anti-cavitation plate should be even with the bottom of the boat.
09-15-2016, 09:53 PM
silverside

All above answers are on point. Just want to add that once the fuel situation is corrected, check the pitch of the prop. Maybe someone has previously changed the prop to meet their use requirements.
09-16-2016, 08:34 AM
Micropterus salmoides

Any help would be appreciated

Thx for ALL the input guys.
I went through all the tilt positions when I was out, I shldve mentioned that. Also , I had the anti cav plate even with the bottom of the hull on first initial run.
I did a lot of research and work bf I would even attempt to go out.
Going out tomor and will move my tm battery to the back and see if there's a diff.
Silverside, funny you mention that. I was talking with my pops about it and he said it sounded like a spun prop hub.
I pulled it and made my marks for when I take it out tomor.
Pitch is 6 1/2.
The prop is 8 1/2 x 6 1/2 N, original to the motor.
I got 7 mph last time I was out but dunno the rpm it was at. Gotta order a tiny tach.
Thx again fellas
Silverside

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09-18-2016, 07:33 PM
Micropterus salmoides

Took a quick video on the water just for fellas asking about sound.
https://vimeo.com/183241307

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09-19-2016, 07:42 AM
Clint

It sounds like it is running just fine. You may have to just accept that as the top speed. I ran a 6HP Evinrude on a 16'48" flat bottom jon and my top speed on my hand-held GPS was 8 mph by myself and 6 mph with a buddy. I kept telling myself that it was better than rowing until I got enough $ together for a 25HP (and it was scary fast on the flat bottom boat).
09-19-2016, 02:34 PM
Catman767

Something is not right with the motor or your set up, I have the same 6hp Yamaha on my 12' vee and with me and all the gear I have mounted in it, the boat will run 17 to 18 mph on a garmin gps With me and my adult son we still can get up on plane. Take it to a good mechanic and get it fixed right, you have a great little outboard there. I just love mine.
Good luck Jim
09-19-2016, 04:29 PM
Micropterus salmoides

Quote:

Originally Posted by Catman767

Something is not right with the motor or your set up, I have the same 6hp Yamaha on my 12' vee and with me and all the gear I have mounted in it, the boat will run 17 to 18 mph on a garmin gps With me and my adult son we still can get up on plane. Take it to a good mechanic and get it fixed right, you have a great little outboard there. I just love mine.
Good luck Jim

Thx. It's been to a mechanic and all checked out A-OK after some minor carb work. My boat is a lil Heavier than a normal flat boat, I searched a while for it, so I'm ok with it just being underpowered until I can beef up to a 25.

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09-19-2016, 06:34 PM
Catman767

Ok sounds good cause that is a great little outboard if you decide you want to sell it pls let me know
Thanks Jim
09-19-2016, 07:56 PM
Micropterus salmoides

Any help would be appreciated

Thx man, don't think I'll let it slip through my fingers if I can help it.
Gon put it on a smaller boat
Plans are a 10'er, 12'er and then a 16-18' family boat.
All will have decent two strokes except the pirogue and truck bed flat.
Something for every occasion.
Gon try n pick this 15 up bf winter from a buddy.
http://uploads.tapatalk-cdn.com/2016...8690192086.jpg

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