85 hp force prop change and questions?

[sqounk]

I looked around a bit, but didn't see it... Tips on how to change my prop. I have a 88 Bayliner Trophy Class 17' foot boat. With 85 hp force outboard. It has a 13.5" x 17 prop now... This sound right? Also I have no tach... Just a speedometer that reads in mPH. How hard to install tach? When I checked the speedometer I did NOT realise I had to "lower it" into position. (It was UP) It read slightly over 22mph but the wheel was up as stated. Also had 5 people and a dog in the boat! My other boat a 66' GW with 100 hp Evinrude Starfire SEEMED Much faster. Than my 88 Bayliner. What to expect out of the 17' foot Bayliner 85 hp Force if running decent?

 

[riptorn]

Re: 85 hp force prop change and questions?

You have a boat 66' GW with 100 hp Evinrude Starfire. Any pictures?
Try a Tiny tach, it works for a 85hp three cylinder Force. Wally world

 

[jerryjerry05]

Re: 85 hp force prop change and questions?

Hard starting?Do a compression/spark test.
The 17 sounds right.
Installing a tach is easy.The wiring harness has a purple lead taped back.
Find a tach cut the hole and figure out the leads.
5 people should be way over the limit for a 17ft boat.
The speedo pick up(pitot tube)the tip can break and not work right.
Like rip says a Tiny Tach will work till you get the right tach.
The make a bunch of TT so make sure that you get the right one.J

 

[sqounk]

Re: 85 hp force prop change and questions?

You have a boat 66' GW with 100 hp Evinrude Starfire. Any pictures?
Try a Tiny tach, it works for a 85hp three cylinder Force. Wally world

I'll get some pics up when I can... It is a choke spring and a starter away from running again. It needs some serious paint and interior restoration but she was always mechanically sound till the starter failed. Thanks for the reply Rip.

On a side note my prop seems (hell with seems, it doesn't have) a cotter pin or locking nut set up... Appears to just have a regular hex nut locking nut with/nylon at best. Is that normal on an older application? 1988 I think....

 

[jerryjerry05]

Re: 85 hp force prop change and questions?

88 is just a Nylock nut and spacers.
Just make sure the thrust hub is right or you'll be grinding aluminum!!!

 

[sqounk]

Re: 85 hp force prop change and questions?

88 is just a Nylock nut and spacers.
Just make sure the thrust hub is right or you'll be grinding aluminum!!!

Could you elaborate? How do I make sure the thrust hub is right? I thought it was splined and would only slide on "one way" so to speak?

 

[jerryjerry05]

Re: 85 hp force prop change and questions?




Pic#1 is Mercury stuff.#2 is Force.
The prop has the thrust washer setting on it.There is a second one on the bench(not used)It needs the thrust hub and the prop then the spacer with the grooves and a thick washer and the nut(wrong washer pictured).
The thrust hub goes between the prop and the lower unit.It's a solid piece of metal.The splined one goes on the other end.
The thrust hub must fit inside the end of the prop and not have any play.
Post pics of the setup your trying to use.J

 

[sqounk]

Re: 85 hp force prop change and questions?

Here is the pic ofmy prop...


oops a little repetitive!

 

[jerryjerry05]

Re: 85 hp force prop change and questions?

That end of the prop is ok.
What's on the other end???
It should have a thrust washer,seen on the bottom of my prop in pic#2

 

[sqounk]

Re: 85 hp force prop change and questions?

That end of the prop is ok.
What's on the other end???
It should have a thrust washer,seen on the bottom of my prop in pic#2

Umm... I'll get some more pics up jj... Thanks for helping Me, its very hard to get help here without wiping out the savings!

I already ordered the prop, a 13.5" x 17 pitch. I have one friend that worked on boats a little... I have run that boat twice to see the condition. What you CAN'T see in my pic I realise now is the chunk missing off the end of the only blade not in the pic! (DOH!) I'll get better pics up and thanks for your help and patience. I will also take pics of my Grady White I am close to being able to get the starter and choke spring thanks to the info I am finding here.:facepalm:

 

[sqounk]

Re: 85 hp force prop change and questions?

View attachment 155131View attachment 155132View attachment 155133View attachment 155134here is the damage...
What is this instrument array? BTW?

 

[sqounk]

Re: 85 hp force prop change and questions?

View attachment 155131View attachment 155132View attachment 155133View attachment 155134View attachment 155135here is the damage...
What is this instrument array? BTW?

Well, prop will be here today... I guess I'll just remove the nut and number all pieces and put it back in reverse?

 

[sqounk]

Re: 85 hp force prop change and questions?

bump.

 

[sqounk]

Re: 85 hp force prop change and questions?

Well, It is done... I swapped the prop, no issues far as I can tell the thrust washer seated fine and no play anywhere! Water test tomorrow.
Thanks for the help thus far... BUT the more I learn the less I know! One answered question brings two more new questions.