correct motor height

[georgevazquez]

I just found this forum and I hope I can get some help for some of you guys with experience. I just purchased my first boat ever, a 2000 parker se21, and it was re-powered with a 2005 yamaha F225 four stroke. The two problems I seem to have is the the boat looks like it sits in the water too low in the rear. Im not sure if that engine is too heavy, the boat seem very squirly when driving at idle speeds don't know if that normal. Second question is, I think the engine is bolted on too low on the transom, when I get up to speed the water level is about three inches above the cavatation plate, everything ive read says it should be no more than 1/4 -3/4 inch above. Saying that the engine is already mounted as high as it can get. Option one move the engine up higher by making new holes and patching the old or trim tabs? Any advice would be greatly appreciated.

 

[DaleH]

OB HEIGHT: See viewtopic.php?f=19&t=11163

LOW-SPEED HANDLING: This is anomoly of V-hulled boats called "V-hull wandering", just go with it and don't fight or over-correct for it, as the boat will follow a fairly 'straight' heading, just with a wandering course!

RIGHT MOTOR LENGTH? Sounds to me like a 25" motor was mounted to a hull designed for a 20" length OB to be installed. If so, I'd add a manual Bob's Machine Shop jack plate to raise that motor, if I were you.

 

[georgevazquez]

your right its a 25" and thank you for your quick response its really shed some light on the subject. It just so happens the guy across the street from me had a company that does fiberglass work at his house and I had him come over out of curiosity and give me a price the move the engine up and plug the old holes 600.00 bucks wow. thanks for all ur help

 

[DaleH]

your right its a 25" and thank you for your quick response its really shed some light on the subject. It just so happens the guy across the street from me had a company that does fiberglass work at his house and I had him come over out of curiosity and give me a price the move the engine up and plug the old holes 600.00 bucks wow. thanks for all ur help

Now if it were my boat I would definitely NOT add new holes and plug the old ones up. You could end up destroying the transom, by changing the location of the holes from where designed to take the stress and loading, to some other place not designed for it ...

I'd most probably add a manual jackplate by CMC (Cook Mfg Company), like their model PL-65, for $300 from Cabelas and re-rig the motor to that. Anyone with an engine hoist or rental and a PU truck can do it. And use your trailer for lifting too, i.e., drop tongue ALL the way to the ground to raise the motor ... then tie off to lift or suitable tree branch (I moved a 90hp motor this way one, V6s weigh a good 600# plus) or I-beam, say in a work garage or such. The raise the trailer way up to life the motor off the hull, install the plate, then re-install the OB.

 

[georgevazquez]

Im going to start calling you the "the wise one" thank you for all ur input.

 

[gw204]

Hard to tell from your pics, but I doubt that motor is mounted as high as it will go. Can you get a close-up of the upper engine mounting bolts? From the side view, I would say you are probably in the second to lowest mounting hole and can raise up 2 and gain about 1.5".

Don't judge the way she sits in the water based on the swim platform. Somebody mounted that way too low... :roll:

 

[georgevazquez]

your right the top two engine bolts can move two more holes, BUT the bottom two are already maxed out in the slot, not allowing me to bump it up. Strange!
from what ive read the bolt patterns on the transons are standard in the location to one another this is what ive seen published,
top two 12 7/8 from each other on center (thats what I have)
bottom tow 9 7/8 from each other on center (thats what I have)
but...... top to bottom should be 8" on center and I have 9 7/8
I think thats why I have space to move two holes in the top bracket of the engine mount but im maxed out in the two two lower slots.
new holes were not made in the transom and old ones patched up thus changing the height of the top to bottom, its all original. I think parker didnt conform to the standardization of hole patterns that year. ( 2000 21se with a 2005 f225)
I dont know anything for sure this is my first boat but it makes sense. if you still want a pic ill take one.
and thanks for all the input from you guys.

 

[gw204]

That's lame. Find out who drilled those holes and smack 'em. :roll:

People usually use a template or jig to drill those holes. My guess is someone placed it improperly and drilled the top holes only to then find out the bottom ones would interfere with the floor, so they drilled those lower (they're probably accessible through the bilge).

 

[georgevazquez]

It looks like it came from factory like that, I see no patch jobs, strange, does any one else have an older 21se that we can compare the distance from top and bottom engine mounting holes?

 

[Brad 21se]

My 2004 21se is the same way. Factory mounted Yamaha 150 with the bottom bolts all the way down in the slots. I was really surprised to see it like this. I would raise it one hole if I was able..... :|

 

[robs66]

I just found this forum and I hope I can get some help for some of you guys with experience. I just purchased my first boat ever, a 2000 parker se21, and it was re-powered with a 2005 yamaha F225 four stroke. The two problems I seem to have is the the boat looks like it sits in the water too low in the rear. Im not sure if that engine is too heavy, the boat seem very squirly when driving at idle speeds don't know if that normal. Second question is, I think the engine is bolted on too low on the transom, when I get up to speed the water level is about three inches above the cavatation plate, everything ive read says it should be no more than 1/4 -3/4 inch above. Saying that the engine is already mounted as high as it can get. Option one move the engine up higher by making new holes and patching the old or trim tabs? Any advice would be greatly appreciated.

correct motor height is very important. Because these need to touch the water. So maintain the the engine level from water. Thats all.