boat without power

rwoodcutter2 · 05-25-2009, 05:14 PM

i went to wickiup for the holiday weekend well i didnt get to fish alot the problem is that when i had 3 or more people in my boat i couldnt get it to plane almost like it was cavitating i not not sure if it would be in the motor or what,the rpms were about 2000 rpms if iwent to open it up to full throttle it would bogg down like it was choking its self i dont know if that could be an exhaust issue or intake ,or carb what should i try any help would be appreciated ,by the way when i had 2 people in the boat i could go 32 mph put 3 adults i could go 10mph i still could not open it to full throttle at anytime because it would bogg down what do you think? It is a 19 ft searay seville with a 4cyl omc the prop is a 13 3/4x17 !

jfa686 · 05-25-2009, 05:24 PM

whats your setup?

Bloom · 05-25-2009, 05:59 PM

Need more info. such as motor size, boat, diameter and pitch of prop, age of fuel in tank, etc.Sounds like it could be fuel starvation(plugged filter, jets in carb,air leak in fuel line).

rwoodcutter2 · 05-25-2009, 06:20 PM

Quote:

Originally Posted by Bloom

Need more info. such as motor size, boat, diameter and pitch of prop, age of fuel in tank, etc.Sounds like it could be fuel starvation(plugged filter, jets in carb,air leak in fuel line).

it is a 4cyl omc fuel was new it has a 13 3/4 x15 degree pitch the boat is a 19ft searay seville

No Reservations · 05-25-2009, 06:28 PM

Not sure of where you usually run that boat but elevation change might be your problem not your engine ! That boat might be a little underpowered with just a four cylinder. If you usually run it in the valley or the coast you will be surprised at the power loss at higher elevations. Sometimes a prop change might help just make sure you watch your rpm's. Just guessing though not knowing where you are from or where you usually do your boating.

Wheel Wash · 05-28-2009, 01:07 AM

You took the boat off the trailer and not the trailer off the truck when you launched .. Right? Ha Ha! Sorry, I had to say it, I have seen it before.....

bvs · 05-28-2009, 04:06 AM

Your boat is way underpowered for a 4300' lake. Here in Utah all our lakes are 4000'+ and 19' boats with the 3.0L 4cyl engines can't be given away. Drop down to a 13" pitch prop and you won't get anywhere fast, but you will be able to get up on plane.

Wet-Net · 05-28-2009, 09:43 AM

Check your prop and make sure it isn't slipping on the hub.
If it is, it can be refurbished for a reasonable cost.

bvs · 05-28-2009, 01:34 PM

I'd think if the prop were spinning on the hub he'd be reaching a lot more than 2000rpms and he'd have the same problem everywhere he boated.

Another thing that will help a underpowered boat is to add a planing fin to the cavitation plate or even better get trim tabs. Both help lift the stern and keep the bow down and get the boat on plane.

Also, try to get your passengers to move to the bow when trying to get on plane. Once you are on plane they sit wherever they want.

It takes twice as much power to plow through the water at 10mph as it does to plane at 25mph and at 4000' your carbureted boat probably has 20% less power than it had at sea level and can't quite push things over the "edge".

honker1 · 05-28-2009, 07:18 PM

Try this website. WWW.NAUTICUSINC.COM
I don't own stock in the company, but I did install them on my 18' Starcraft and it was an amazing how faster the boat would come up to plane. Just make sure you get the correct ones for your size of boat and horsepower, and the cost is reasonable.

Okie · 05-28-2009, 08:47 PM

Actually Wickiup resevoir isn't really a big enough lake that you should be planing and traveling at high speeds on. But if you do it will certianly make a lot of other fishermen mad.

Trolling speed or a little faster should be sufficent to travel any place on that lake.

Good Luck

rwoodcutter2 · 05-29-2009, 03:08 AM

Quote:

Originally Posted by Okie

Actually Wickiup resevoir isn't really a big enough lake that you should be planing and traveling at high speeds on. But if you do it will certianly make a lot of other fishermen mad.

Trolling speed or a little faster should be sufficent to travel any place on that lake.

Good Luck

have you been to wickiup it is big enough to get to top speed,but the problem is why cant i plane with extra weight in the boat.
thanks for the advise anyway!

Capt. Slick · 05-29-2009, 03:47 PM

I had a 460 carborated 20' sled that would not plane if i had 4 people in the boat. If it is not fuel injected i would bet that is your problem an if you keep the throttle up you will gas soak your piston rings. I would check your oil and make sure it does not have a lot of gas in it and take it to a lower alt. lake and run to check.

rwoodcutter2 · 05-30-2009, 05:54 PM

Quote:

Originally Posted by Capt. Slick

I had a 460 carborated 20' sled that would not plane if i had 4 people in the boat. If it is not fuel injected i would bet that is your problem an if you keep the throttle up you will gas soak your piston rings. I would check your oil and make sure it does not have a lot of gas in it and take it to a lower alt. lake and run to check.

what could happen if you soak the rings?

No Reservations · 05-31-2009, 06:20 AM

Quote:

Originally Posted by rwoodcutter2

what could happen if you soak the rings?

Have you tried your boat since you have been back in the valley bet it will run like a top back in eugene I still am betting your problem is elevation not mechanical problems.

rwoodcutter2 · 06-02-2009, 04:01 AM

Quote:

Originally Posted by No Reservations

Have you tried your boat since you have been back in the valley bet it will run like a top back in eugene I still am betting your problem is elevation not mechanical problems.

you are absolutely right it did run like atop but it still would bogg down when i open the throttle all the way so i think the carb needs rebuilt because it seems that it would not get enough gas at full throttle or its getting to much gas at full throttle i am not sure how to check that!
thanks for all the info.

packer · 06-03-2009, 09:18 PM

Before you go to all the expense of a carb rebuild , pull off your distributor cap and make sure you don,t have any condensation in the cap . next look to see if you have a point ignition system , if you do , replace the condenser, if it is weak it will cause the symptoms you are describing

MattPark · 06-03-2009, 11:24 PM

I've got $100 on the accelerator pump in the carburetor. I believe with those carbs you can see the accelerator pump spraying if you look into them from the top (with the engine off of course). If you quickly advance the carb to full throttle, fuel should spray into the engine with a vengeance. My guess is it's not.

Attempt all diagnosis and repairs at your own risk.

SnapperBlue · 06-15-2009, 09:51 PM

I'm looking at some old posts and wondering if you solved your problem. My boat was acting up with similar symptoms. It turned out that my point dwell had shifted and was way off, and that also affected the timing.

I reset the points and timing, and everthing was back to normal.