Building twin outboards for my Convincor

[atc250r]

Yes, Diamond builds a fantastic motor.

 

[sonicss31]

Thanks for all the comments so far. I totally agree about the "Devil is in the Details. I'm still building my first engine stand four days later. Boy am I out of practice. I cut all my pieces using the miter when I should have used the bevel part of the saw. At least I had a good laugh at myself.

I'm not sure if these motors are stock or not. They came off a Superboat and they have an "Island Perfromance Marine" sticker on the airbox. Does anyone know of this company in Lindenhurst, NY? I believe the owners name is Mario. I gave him a call and asked how much for a rebuild on the one that's down on compression and he quoted around $2,200ish but said it all depends on whats going on inside there.

My daughters (Spoiled Rotten) Starflite has a motor built by Mario and 3 years now and no problems. It runs strong using premix. I never met him but my research did not find anything bad about him.

 

[DropTop5.0]

My daughters (Spoiled Rotten) Starflite has a motor built by Mario and 3 years now and no problems. It runs strong using premix. I never met him but my research did not find anything bad about him.

Thank you very much. Candice's boat runs very good. Was that a run of the mill "Black Max" 200 on there?

 

[sonicss31]

Thank you very much. Candice's boat runs very good. Was that a run of the mill "Black Max" 200 on there?

Stock as far as I know. It has Boyensen reeds and is jetted kinda fat. Never put wrench on it and that is the way I like it.

 

[DropTop5.0]

I've been pretty busy for the last couple of weeks. I had to go to Austin City Limits Music Festival. Boy that was tough. I love me some good beer, good food and awesome music. Austin knows how to throw a party!!!

Then I spent a week in Cherry Point Marine Corps Air Station trying to figure out why our new barracks is six months behind schedule.

When I had an hour here and there, I was trying to throw together an Engine stand. I am so behind the power curve. When I was cutting my pieces I cut them using the miter when I should have used the bevel, LOL. It really makes me respect the craftsman out there.

I bought a cherry picker and finally got the complete motor out of my truck. that only too two weeks.

 

[DropTop5.0]

My stand almost looks too small. I hope it works okay. I think I'll lower it down easy and see how it does.

 

[Jon Kansanniva]

I don't think that stand will work. The weight of the motor is just in
front of the rear wheel, that will flip over backwards real easy! You
might be able to relocate the upright part all the way to the front to
change the center of gravity. I think you might want to beef it up a bit
as well

 

[Instigator]

I don't think that stand will work. The weight of the motor is just in
front of the rear wheel, that will flip over backwards real easy! You
might be able to relocate the upright part all the way to the front to
change the center of gravity. I think you might want to beef it up a bit
as well

Agreed w/above.

I'd move the uprights forward as far as you can go and you'll have some killer stands!

A word of warning while working on motors on stands........., do NOT tilt the motor up if you have the gear case off!!!
I did that on a customers motor I'd just finished. Had a REALLY rare cowling on it (I just sold him) too.
It started over and I tried to stop it.
I rode it to the floor!
Destroyed the cowling and two carburetors.

I didn't get a scratch though. Was very, very lucky.

The gear case acts as ballast while the motor is on the stand. W/O it, the motors center of gravity is about 2' higher!

BTW, I used a wood stand for yrs that I built before I could weld. It held many, many 450lb OMC loopers w/zero issues.

 

[Rob B]

The motor stand plans you got from Iboats was built/designed for a 50 hp motor if I remember correctly. I agree with those above, you don't need that flipping over!!

 

[DropTop5.0]

Thanks guys for weighing in. I think it needs to be a little wider and longer as well as moving the support forward. Is it okay to leave it hanging for a week or so or should I lay it down on a pallet?

 

[Tx91z28]

those hoists have a tendency to leak down over time, i would not leave it hanging too long without being able to check it every day or two

 

[Problem Child]

Or just put a 2x fit snug under the hoist to stop it from dropping down. Good lucknwith everything Chris. Cant wait to run with you and your twins!

 

[Rob B]

Here's a beefy motor stand from The Hull Truth website. http://www.thehulltruth.com/boating-forum/97641-pics-your-engine-stands.html#M1157894

 

[DropTop5.0]

Thanks Robbie, I think I'll go the 4X4 route. I've got all winter right?

 

[DropTop5.0]

I forgot I had an engine stand in my basement. Too much hoarding I guess.

Finally got the motor off the cherry picker and on a stand.

 

[mishawakajim]

Wow, now that's a nice find. Jim

 

[DropTop5.0]

Okay gang, now here comes my ignorance and I need some help, I need a plan of attack. The complete motor that you see on the stand above has something wrong with the powerhead. I'm not sure what it is. The powerhead on the crate has good compression (according to the seller) and I'm going with the assumption that its good.


Should I try and do a Compression test on this powerhead and if it checks out maybe rebuild the carbs then stick it on the assembed mid and try and get it to run. I feel like I should remove these studs and run a tap through them and make sure they are all cleaned out.

I haven't decided if I want to tackle rebuilding a motor or not. I'm not scared to do it but I'm more scared that I'll start it and then I won't get back to it in a large number of weeks and I'll for get how it came apart. I guess thats what the manual is for.

 

[sonicss31]

Leave the studs in and run a die to clean up the threads. Pull the heads to take look at the cylinders. Head gaskets are not e costly. Pull the carbs and reeds to check them out. Mount it up and start. Or find a good engine guy to rebuild it for you. If it is not damaged the costs are not going to be out of sight. Good luck.

 

[DropTop5.0]

Thanks for your advice. I'm traveling again for the rest of the week so I'll have to wait until the weekend.

 

[DropTop5.0]

Didn't get too much done this weekend as I felt like crap. I did manage to buy a couple of saw horses and make myself a little work bench. Just one of those things I've been wanting to get to is removing the props from the shafts as I'm scared they might get dinged up. The one on the stand came off no problem but when I looked at the one that is disassembled it doesn't have a nut on it and appears to be stuck.

I tapped it lightly with a rubber mallet to no avail. Any ideas on how to pry this thing off the shaft? I was thinking of spraying it down with PB Blaster for a few days and see what happens.