BAM Transmission
 

During the seneca lake battle ship run the past weekend. The boat started to not want to go into gear. Shift lever operation is smooth. But at idle RPM's (800ish) it won't go into foward gear. If you give it more RPM's it goes in and stays in no problem. But once you back the throttle back down to idle it jumps back out. This is the first hard run since iv owned the boat but short trips on my local river gave me no problems It's a 27'Activator with a blower 598 and a BAM 1500 transmission connected to a SSM 5. This is my first non Bravo boat so I wasn't sure if this is something normal or if I should start digging into it further.
Thanks Kile

Not normal
I'd like to see a picture of the plumbing. If that's ok most likely it will need to come out.

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Sorry for the BS posts. Need 10 to be able to post pictures. Hopefully these are help. If there something more specific to take pictures of just let me know. I'm not sure if it's related to the current issues or not but during spring matinance It was discovered that the fluid level on the dip stick was a quart high and there was no fluid in the reservoir. It's like there was nothing formal stopping the fluid in the reservoir from just free flowing into the transmission. A ball valve was installed so I could just add some when needed
https://cimg5.ibsrv.net/gimg/www.off...2be2255b16.jpg
https://cimg4.ibsrv.net/gimg/www.off...e6302bca7a.jpg
https://cimg0.ibsrv.net/gimg/www.off...84c228a360.jpg
https://cimg2.ibsrv.net/gimg/www.off...974ec98c98.jpg
https://cimg6.ibsrv.net/gimg/www.off...8b50b34269.jpg
https://cimg3.ibsrv.net/gimg/www.off...610621863c.jpg

The line on top is the vent, not a reservoir.

Some people connect them to a bottle just in case but normally that is not needed. In any case I doubt if this is the actual problem but lose the ball valve and the excess fluid in the bottle. Make sure the bottle is vented freely.

What position is the shifter in for these pictures?

10 -4. These pictures are all taken in neutral.

Hmm maybe it's the angle but looks like it could be forward to me?

The only BS is the archaic 10 post before posting pictures. It serves no purpose. Most everyone knows it and members tell new members what to do about it. Like you just did.

here are a few more I tried to take from a more straight on angle. Its like trying to fit 10 lbs of potatoes in a 5 lbs sack to climb down in the bilge lol. If there is any other trouble shooting I can do just let me know. If not I guess its tear down time.
https://cimg8.ibsrv.net/gimg/www.off...db9bda0df5.jpg
FWD
https://cimg9.ibsrv.net/gimg/www.off...8044447d38.jpg
FWD
https://cimg1.ibsrv.net/gimg/www.off...1046c73f66.jpg
Netural
https://cimg3.ibsrv.net/gimg/www.off...e781a7539e.jpg
Netural
https://cimg6.ibsrv.net/gimg/www.off...61ced28afc.jpg
Reverse
https://cimg9.ibsrv.net/gimg/www.off...f237c40900.jpg
Reverse

Yep I can see it better now.

You have a pretty typical hookup for the cable. And not your fault, the geometry is terrible with that setup as you can see by the bend in the adapter. These units are really picky about being all the way in gear or having a clean neutral. That is why we came up with a decent linkage kit to clean up that situation .

Not saying it's your problem but just another thing that can go wrong.

You might want to do one more test with the cable disconnected and the lever all the way in forward and see what if does. Other than that you will need to pull it apart.


Attachment 577711

It is part of Spam prevention. No way to prove its actually working though, since spammers with less than 10 posts can't post pics. Most spammers go away before making 10 posts or there posts are so blatantly obvious that we ban them early on. New members with less than 10 posts also can't posts links or email addresses until the post is reviewed and approved by a moderator.

The requirement to have 10 posts before you can send a PM has eliminated 98% of the PM Spammers

I too will tell new members who are obviously legit to make some useless posts so they can post pics and get help they came to OSO for.

What's that bracket cost wise Marc.? Nice piece.

Thanks, it took a while to get it right.

https://www.mercruiserparts.com/cyborg-linkage-kit

I have a set of those linkage kits , I will say they are very nice and they cleaned up a lot of my alignment issues .

Thanks for all the help Marc! I will try it with out the cable this week just to see. If not I'll be giving you a call about rebuild options.

Having issue with mine. It's been perfect, on our way home Sunday at about 3500rpms getting on a plane fell into neutral. Won't engage in forward or reverse. Fluid level looks perfect. Limped home on one motor, started the second motor while moving slowly and it started with a slight thump. I'm wondering if it could be u-joint on the shaft going to the outdrive?