1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

today we took it to neu's hardware store and my buddy helped us tap a larger hole and i put a 7 mm x 1mm screw in with teflon tape. we drove around all day. After we got done we checked and no water or dripping discolored water so its looks to be sealed. Im wondering why it did this and what the bolt was for. it wasnt a drain plug. its next to it on the lower unit though. i looked it up and it says its called a pin screw or something. well we drove it and it was fine except i still nedd to adjust the shifter and gears or something. it wasnt going in gear and then when we put it in gear and tried to go in reverse it would still go forward pulling the shifter backward. I had to turn the engine off and repeatedly pull the shifter from nuetral to reverse in a fast motion then put it back in nuetral and start it then it will start in reverse. Also id do the same to get it back into forward drive. lol its weird. i think i just need to fine tune the adjustments. if i cant get it i will need to take the lower unit apart and inspect it for problems. new seals and gaskets or whatever. also heres a tip if you gun the engine in reverse for too long it overheats. i suspct this to be because the impellar doesnt suck water in that direction or something like that. we didnt overheat bad but the alrm went off. well anyway ill keep you informed

 

[swick]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

I got my new head gasket yesterday and opened up my o/b. Sure enough it needed replacing. Looked similar to yours, only the metal was cracked, but not missing. Was also tore in 2 other spots. I have a 4 cylinder, so all three holes were in line with the rubber between the clynders. I guess when it ever needs to be replaced again I can expect the same situation. Tried to take a video but my damn camera must've had a blown head gasket too! Anyway I guess I'll take a pic of the old gasket and add it here later.

There was a notable size score on the my lowest cylinder, I put it all back together with the new gasket in place anyway. When I rotated the flywheel (prior to putting it back togther) everything performed as it should, nothing got hung up, nothing unusual, no abnormal noises. When my new starter gets here monday I'll check compression again and see how I did. We'll find out if that score in the cylinder is something to be concerned with or not. Hopefully it was from chewing up an old spark plug or something.

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

oh im glad too hear that swick. I'm sure your gonna have way better performance. Also if you want try to put some kinda of cleaner in the gas and clean up all of the carbon deposits. I havnt done it yet but i hear that carbon can build up and cause an engine to have less compression. when i saw my engine the cylinder that had the blown part of the head gasket had a significant more carbon buildup than the rest. so i assume that having a blown gasket makes carbon buildup because its not firing properly or something.

Im still trying to figure out how to adjust the shifter. I can get it to go into reverse but its hard. I have to shut the engine off and jerk it. Also I cant get the engine to rev to more than 4100 rpm. I brought the gps and we only got to 29.6 mph. I am thinking the engine just cant get over that hump but if i bring the prop up to just when its going out of the water then it will rev to 5000 rpm but only because it has les drag on it. but it doesnt push the boat anymore out of the water.

Im testing it and ill have more info soon

 

[jerryjerry05]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

A blown gasket won't produce more carbon.It's the other way around carbon makes the gasket go bad.
Too much oil and having the carbs out of adjustment can make it carbon up.J

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

do you possibly know how to adjust the carbs. I was going to try to do that this next test run but am not really familiar with them. any tricks or advice you could give me. maybe thats why we cant get it to go over 4000 rpm. and maybe why it seems to lack power. it takes a really long time to get to plane. and if i give it gas to fast it tries to bog out and die. thanks for the info.

 

[swick]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

I don't remember if you said you did a decarb or not? Anyway, I have two carbs on mine and I was able to order the carb kits on ebay for $40 each. All it really is is a matter of taking them off, taking them COMPLETELY apart, and swapping out pins and gaskets. Of course you will want to let them sit in some carb cleaner over night before putting them back together. What happens is the old fuel makes the pins and everything stick, open or closed. Either way its a bad deal and the engine won't work right if you haven't done that. I guess this is something that should be done every year, just like replacing the impeller & thermostat. Its very simple to do, especially considering everything else you've done so far.

After you've done that, you can tinker with the adjustment screws and see what does what. They basically control how much/ how fast the carbs are getting fuel, but 1st you need to re-do the carbs. If you are interested I can give you the guys ebay member name who I got mine off. He was way cheaper then anyone else I seen out there, and he sent them right away.

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

i figured out whats wrong with the shifter. it was stuck in forward gear because the bolt that fell out was a shift pivet screw. I replaced it with a bolt to stop it from leaking oil but the thing became disconnected inside the gear housing.

I already have the gear housing off. i slid the shift rod out and it was already disconnected from the peice inside the lower part of the gear housing. this really sucks because I cant get in there to reconnect the pieces and the space is so small i can barely get a long tweezers or anything.

I cant believe that this little screw caused this much problems and why there wouldnt a warning sticker ive seen a couple posts about people confusing this screw with the drain screw.

well i already took it out and was messing with it for awhile so realigning it is not possible. Do i really have to take this whole thing apart. and where do i find the tools to disassemble it. I cant even get the stop washer screw thing off to get the gears out. IM STUCK

 

[roscoe]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

Not only that, but since you drilled it out and put a larger screw into it, you can't use original parts to fix it.

Yes you will likely have to totally disassemble the lower unit.

But don't know where you will find a screw that will fit the yoke and the new larger hole you drilled.

At this point, you are better off buying a used lower unit and putting it on.


Oh, and buy a repair manual before you adjust any of the carbs, or you will likely burn it up. This isn't a lawnmower. Air fuel mixture is critical, linc n sync is critical.

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

stupid boat. Im not buying a new lower unit. can barely afford gas in this thing. lol. i need to figure something out. I will fabricate myself a new pivet screw but as far as the shift yolk and the other thing in there i cant f''n believe this. one lil screw. the gear housing is fine except for the shift thing but its just so hard to get too. i am taking this apart and fixing it but i cant find the tools to disassemble the lower gear housing. and i see that even after i pull the gears and bearings out its still a tight squeeze . but i will succeed. any suggestions would be appreciated. how much is just the lower unit anyhow?

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

I gave up and just took the thing to my friend. He has his own auto shop. they occasionally work on boats. We ended up finding out we will have to replace a bunch of stuff in the lower unit. it was pretty bad. he said its never had maintenance. The impellar was so crusty i am very surprised we didnt overheat. it basically fell apart in my hand when i took it out. everything was corroded. So we ended up having to spend over 200 dollars on parts for the lower gear case and water pump assembly.listed below. That was all cracked and fractured as well. all the plastic casings in there had hairline cracks on them. also the threaded retainer that holds the lower gears in was so crusty it just broke trying to take it out. basically doing a rebuild without putting new gears in. lucky those were ok. so thats it until the parts get here. Ill take some pics of me putting it back together.

oh and i looked .. the cheapest used one i could find was 2300 dollars. no way am i investing that kind of money lol. i think we lucked out

12-818074A1 : COVER ASSY 5/31/2010 1 0 1 96.21 96.21

12-819217 : RETAINER 5/31/2010 1 0 1 32.05 32.05

12-819217 : RETAINER 5/31/2010 1 0 1 32.05 32.05

12-826374 : PIN-RETAINER 5/31/2010 1 0 1 4.55 4.55

12-25007 : O RING 5/31/2010 1 1 0 0.66 0.66

12-803757T : BODY WATER PUMP 5/31/2010 1 0 1 15.37 15.37

12-8245191 : RETAINER 5/31/2010 1 0 1 2.90 2.90

12-F707278 : O RING 5/31/2010 1 0 1 3.79 3.79

12-F694031 : GASKET 5/31/2010 1 0 1 1.27 1.27

12-F699562 : PLATE-W/O HOLE 5/31/2010 1 0 1 9.81 9.81

12-F694830 : GASKET 5/31/2010 1 0 1 1.01 1.01

12-819740 : SEAL 5/31/2010 1 0 1 3.84 3.84

12-33144 : SS BY - 12-89238 - SEAL 5/31/2010 1 1 0 9.87 9.87

12-90011 : O RING 5/31/2010 1 0 1 1.19

 

[swick]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

Wow man, sorry you had to go thru all that trouble. I heard people say a million times "never buy a boat, its like a hole in the water that you throw money into." Well I bought a boat anyway, but after all the hard work, expense, and heartache, there comes a perfect day that makes it all worth it. I had two of them this weekend. Incident free outings, my 9 yr old caught his 1st fish, friday and saturday we dropped in the ocean for the 1st time and took a swim.

So after the last $200 you spent is everything ok or still more to do?

 

[TYLER HUNN]

Re: 1991 Bayliner Capri, 90hp force. No power, overheating, and Bogs out?

yeah i had my buddy rebuild the lower unit. it works great now. i decarbed the engine and took it out today. on the trailer running the motor seems to run great. if i give gas to fast though it tries to bog out and i have to let off the gas. then it will catch up and i can slowly rev up to 3500+ rpm or more out of the water or in neutral. on the water in gear it will run good up to 1700 rpm then if i try to give any more gas it just wants to die. im thinking its either giving it too much gas or not enough. i have the low speed adjustment screw correct. but i thiink the high speed screw needs to be adjusted but i cant even find it. i think its on the inside of the carbs. if you have any suggestions that would be great. im gonna do some research tonight.