prop question too big??

[bobboater1]

i got a useb prop off ebay for my 5.7- alpha 1 drive set up it about 13.5 in dia i am missing my lower zinc plate. but the prop fits well but it looks a little big . only 2 " below where adj. zinc plate will go..any help would be good
bob

 

[ziggy]

Re: prop question too big??

seems like if it misses the trim tab and ya reach wot. that would be what yer lookin for.....
as a side note, when i R&Red my prop, it didn't miss the tab. grind to fit.... or R&R to the next smaller tab. zinc....
there are different trust washer thickness's too. that'll mover yer prop fwd. if ya need to do that....i did.....went thinner.....good luck with her.......

 

[bobboater1]

Re: prop question too big??

1" clearance i got just measured it..but a nice prop- hopefully not a paper weight

 

[bobboater1]

Re: prop question too big??

trim tab is missing.....

 

[Bondo]

Re: prop question too big??

trim tab is missing.....

Get a New 1,....... They come in all sizes,.....
From Massive to just a Flat Plate.......

If you have P/Steering,... You should be Just Fine with the Flat Plate......

If Not,.... Go for the Smaller 1.......

 

[MelLandry]

Re: prop question too big??

trim tab is missing.....

If you have P/Steering,... You should be Just Fine with the Flat Plate......

If Not,.... Go for the Smaller 1.......

Excuse my potential ignorance (it abounds) but because the trim tab compensates for the torque of the prop, wouldn't the lack of said tab necessitate that the outdrive be slightly turned during straight travel to compensate for the same tourqe? If you have power stearing, this wouldn't likely effect driveability, but wouldn't the angle of the leg increase the drag and possibly knock a little off of performance? Also, because of direction of force from the outdrive, wouldn't the boat tend to be pitched to one side during straight travel in this case?

 

[QC]

Re: prop question too big??

Newer Bravos and Alphas with power steering do not have a tab. They have the flat plate. The 1995 5.7 TBI Alpha I installed straight out of the crate from Merc was this way, and I have a 2001 Bravo 1, 6.2 now. Both have flat zinc, no trim tab.

 

[bobboater1]

Re: prop question too big??

QC. . mine is a 89 5.7 glastron carb. w/ alpha 1power steering
bob

 

[Bondo]

Re: prop question too big??

Mel,.....

Basically,.... If those symptoms Are present,.....
It's Probably the Wrong Prop for that application.....

That Tab isn't really even In the water when you're Really Gittin' It.....