125 L Drive. THE Big ooopps. (long)

[mieufarmer]

Humm, Where to start? Well I bought a '89 Bayliner Capri for $200.00. The owner thought it had a lock up motor. Ok. Well after inspecting it I found a locked up bearing in the lower foot. I took it apart replaced the brearing. Which was $27.30 and $15.00 for the Drive Shaft shop it press it off and on the shaft. Put a New water pump kit W/housing on it. Then I took out and Man this thing runs great. Stayed out for 3hrs playing around. <br /> Now, Here is where it gets ugly. The boat came with a set of MUFFS to rise the motor out with. SO I used them ( before I read this board ) Burnt the water pump up. I did'nt know this until I went out today with my Wife. We left the dock and off we went. It ran great for about 5 mins. I felt a shutter and I back out of it then the over temp buzzer when off. I turn it around and headed back. I was running at 4500 rpm when it came on and I pulled back to 1500 rpms. It took awhile for the buzzer to go off.( 5 mins ) When we got back I turn switch off it kept running faster. I pulled kill switch nothing, OH ****. IT's GETTING FASTER. so I choke it out by pushing the key in and closing the choke butterflys. WOW that was wierd. This thing was HOT! The buzzer went off I thought it was cooling. NOT! I got it home and pull the lower foot. Water pump was trashed. Hooked the hose up to inlet fitting on bottom of boat. Turn the water on low. when to start it and it lock up. What the hey! Pulled the plugs and water started running out of the lower cylinder, damm it. Oh yea, I also pull the hose off at the spacer plate so I could make sure the water was running. With all this happening what do I do now. Is the block cracked? The head? What should I do now? Where is the water coming from? Any help would be greatfull. Thanks Michael.

 

[bnk999]

Re: 125 L Drive. THE Big ooopps. (long)

You had a runaway motor there -- Can happen when 2 cycle motors get hot -- if you get a Glowing hot piece of carbon in there, or if the motor is just so hot it keeps the combustion going even without spark. If you ever hear that buzzer TURN IT OFF and let if cool for a good while (I'd let it cool for an hour before starting it) Only way to determine damage is pull that head off and inspect. (hope it's only head gasket) When these motors get hot the oil starts evaporating and at the same time the pistons start expanding from the heat- This puts a huge amount of stress on your rings- I speak from experience I just replaced my whole powerhead -- Overheated my motor and actually burnt a piston, snapped a ring and scored a cylinder- These motors are very reliable except they are not very tolerant of being overheated-

 

[roscoe]

Re: 125 L Drive. THE Big ooopps. (long)

Well, your $242.30 boat just got expensive.<br />Advice by qab999 is good.<br />Tear it apart and pray it is only a gasket.<br />Like qab said, these motors really don't like to be overheated.

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Oh Please, Oh please be just a head gasket. I realy like this boat. I would hate to have to cut it up and junk it. I'll pull the head later today and let yall know. BOAT, (Brake Out Another Thousand). See ya Michael

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Well, I pulled the head last night and the head and head gasket looked fine no tell-tell signs of leakage. I did a compression test before pulling the head. The numbers are #1-140 / #2-137 / #3-134 / #4-136. <br /><br />The pistons and cylinder walls look good. did'nt see any cracks in the head. So now what? Where could the water get into the #4 cylinder. Could the exhaust manifold or block be cracked? Thanks Michael

 

[bnk999]

Re: 125 L Drive. THE Big ooopps. (long)

This guy had a similiar problem -- good compression, but water in motor- <br /><br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=33;t=005817

 

[peacekeeper6]

Re: 125 L Drive. THE Big ooopps. (long)

how is that L drive? people tell me that i should trash mine. i have the same one u do most likely 125 HP bayliner 89. i need a new stator so i am tracking one down. should i put some parts in it or should i trash it? what was that thing with the muffs? i have muffs too but what is bad about using them?

 

[roscoe]

Re: 125 L Drive. THE Big ooopps. (long)

You have a hard time getting water to circulate when using muffs, resulting in overheat.

 

[eurolarva]

Re: 125 L Drive. THE Big ooopps. (long)

Your compression numbers look good. How did the head gasket look when you took it off?<br />Gab999 No offense intended here, just a matter of being informative. The scenario you speak of is called "Dieseling" whereas the combustion occurrs due to a different source other than what we have come to know and accept as ignition via the spark plug. <br /><br />Dieseling - The engine runs on even when the regular ignition (spark delivered to plugs) ceases to exist. <br /><br />Runaway - There is no throttle control over the engine which gains over the limit rpms quickly, which can only be slowed down or stopped by flooding with fuel or shorting the ignition out (keeping it simple).

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Well when I pulled the head. I had ONE bolt that gave me hell. The Head gasket looked old? but no signs of blow by or leakage. I was thinking that it might be a crack in the exhaust but I had the hose off at the spacer plate prior to the exhaust. Does water go thur the exhaust before the cylinders? Kind of like a pre- heater? If not I've got a crack some where in the block. any thoughts? Thanks Michael

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Oh yea, The bolts around the lower cylinder seem to break losse easier than the rest. Any thing to this? With the water on and spark plug out water would run out of the cylinder at pretty good pace. More like a HOLE than a crack. I'll pull a transfer cover tonight and look. Thanks again Michael.

 

[peacekeeper6]

Re: 125 L Drive. THE Big ooopps. (long)

so one shouldnt use muffs at all? how do u get the salt water out? how is your l drive running besides your problem?

 

[bnk999]

Re: 125 L Drive. THE Big ooopps. (long)

Eurolarva<br />I have seen a 2 stroke motorcycle runaway on a friend of mine - We were working on it and we kept revving it up and it started going crazy gaining rpm's. We turned off the ignition and it was still going crazy, rpm's were pegged -- then we turned off the gas at the switch below the tank and it was still going crazy for a minute or two till it ran out of gas- Scared the crap out of us- My pops told me the motor was so hot that is was creating the heat to combust on it's own even after the ignition was off-- <br />This is what I was referring to as a runaway motor-

 

[eurolarva]

Re: 125 L Drive. THE Big ooopps. (long)

I am sorry gab. I got nailed using the term runaway as you did and I started researching the subject. What I found is that a runaway motor can be killed by grounding the ignition. Typical runaway would be if the throttle linkage broke and the motor would rev higher then it is suppose to. The search I did and the people I talked to told me deseiling is the term used for gas being ignited by carbon that acts as hot coals. This firing continues compression to the fuel pump so fuel is still being tossed into the fire. My guess is that the terms are interchangable. Dammit JIm Im a printer not a mechanic . If I stepped on toes I appologize,

 

[bnk999]

Re: 125 L Drive. THE Big ooopps. (long)

No hurt toes -- don't worry bout that-- See I always knew dieseling to be like in a car when you turn it off and it keeps running, knocking and coughing for a little bit till it sputters out,- Which was the opposite end of the spectrum from the motorcycle that looked and sounded like it was about to explode into a million pieces- I guess I just looked at it from the literal "runaway motor" aspect -- I too am not a mechanic, just a weekend tinkerer on anything from my RX-7 to my 'ol boat

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Boater Dude, <br /> Other than the proplems at hand and a bad lower bearing this L drive runs great. Not many left around. I think it's cool when you put it in the water and fire it up and some of the looks I get. They see I/O but hear an Outboard. It's pertty funny at times. Its got plenty of get up go. If I can get the parts I'll fix it. If not I'll part the L-drive and take one of my spare BB chevys and go with a Berkly jet drive. The hull looks brand new. A Real clean boat.<br /><br />I Have'nt got the exhaust manifold off yet. Been to busy with other things, maybe Sunday. I'll keep yall posted.

 

[peacekeeper6]

Re: 125 L Drive. THE Big ooopps. (long)

so what other applications can u hook into the L drive? when u say jet drive does that mean that ur using ur L drive hull?

 

[mieufarmer]

Re: 125 L Drive. THE Big ooopps. (long)

Yep, I'll use this hull a mod it to install the Big Block and jet drive. I'll losse a couple seat but no big deal. Jet dive New from berkely is 3.5K Motor mounts and Other stuff is around $550. So for 4K it will still be a nice boat but with a jet drive big block. $550 for a exhaust manifold if I can find one. See YA. Michael

 

[peacekeeper6]

Re: 125 L Drive. THE Big ooopps. (long)

hum, i would like to know what mods you have to do and how hard it would be to do that.

 

[peacekeeper6]

Re: 125 L Drive. THE Big ooopps. (long)

is it possible to get another power head and hook it up instead of using the force ones?