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Author Topic: 170 renovations 78'  (Read 4787 times)

August 13, 2020, 07:43:14 PM
Reply #60

RickK

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Re: 170 renovations 78'
« Reply #60 on: August 13, 2020, 07:43:14 PM »
Let us know how they work in the same weather situation.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

May 31, 2021, 03:42:09 PM
Reply #61

Mwar410

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Re: 170 renovations 78'
« Reply #61 on: May 31, 2021, 03:42:09 PM »
After years of contemplation, I finally put the 115 on it.

Not sure about how it’s going to work out but I figured I’d try it.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

May 31, 2021, 03:56:08 PM
Reply #62

Mwar410

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Re: 170 renovations 78'
« Reply #62 on: May 31, 2021, 03:56:08 PM »
Also got a new pup

Which meant new decking was needed. Then it started to snowball. Deck and liner prepped and painted for new Seadek like stuff, new hardware, shim the console with Starboard spacer, new rod holders, redo the bright work.....



1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

May 31, 2021, 08:50:25 PM
Reply #63

boatnamesue

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  • Jason
Re: 170 renovations 78'
« Reply #63 on: May 31, 2021, 08:50:25 PM »
I’m sure you’ll love it....I’ve got the same motor hung on my ‘76.  That Yam 2stroke looks clean or at least the exterior does.  What year?  I’m curious how the hull will handle with those few added inches of setback. 
---------------
Jason
1976 AS 170
1998 S115TLRW

May 31, 2021, 10:12:22 PM
Reply #64

Mwar410

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Re: 170 renovations 78'
« Reply #64 on: May 31, 2021, 10:12:22 PM »
It’s an ‘03. I’ve been worried about the setback but it’s only temporary until my 90 is back together. Hopefully I’ll have some time this week to water test it and figure out what wheel to run. It’s still sitting up about 5” where the 90 has been running.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

June 09, 2021, 09:01:42 PM
Reply #65

Mwar410

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Re: 170 renovations 78'
« Reply #65 on: June 09, 2021, 09:01:42 PM »
Getting closer to water test. Did the lower unit, changed plugs, flushed carbs, put muffs on it and…. No crank. Parts on order and it’s another day till it’ll see the water.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

June 12, 2021, 06:45:08 AM
Reply #66

Mwar410

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Re: 170 renovations 78'
« Reply #66 on: June 12, 2021, 06:45:08 AM »
For you guys that are running 115’s, what kinda of pitch are you turning?
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

June 12, 2021, 07:45:41 PM
Reply #67

boatnamesue

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  • Jason
Re: 170 renovations 78'
« Reply #67 on: June 12, 2021, 07:45:41 PM »
When I bought my rig the previous owner had a SS 4 blade 21" installed...slow hole-shot and topped out at 4500 rpms.  Trialed a SS 3 blade 17" which resulted in >5500 rpms.  Added 1 more inch pitch and went with a SS 3 blade Quicksilver 18"....sweet spot. 
---------------
Jason
1976 AS 170
1998 S115TLRW

June 13, 2021, 05:44:04 AM
Reply #68

Mwar410

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Re: 170 renovations 78'
« Reply #68 on: June 13, 2021, 05:44:04 AM »
I started with an aluminum 21, topped out at 4800. I think my tach is a little wonky so I swapped it out last night with a new one. Didn’t really notice any bow rise and hit 43 mph in a hurry. I’ll play with it again this morning, maybe try a SS 4 blade 20 that’s been laying around.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

June 14, 2021, 09:39:21 PM
Reply #69

Mwar410

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Re: 170 renovations 78'
« Reply #69 on: June 14, 2021, 09:39:21 PM »
Still messing around with the 21p, and motor height. But it’s running solid and not really worth fine tuning it much more.
 5 1/2” Setback hasn’t had any negative ride that I noticed.
Scuppers are almost completely under ( about 1/4” more)  and water just about stays in the well without plugs in.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

June 14, 2021, 10:06:44 PM
Reply #70

boatnamesue

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  • Jason
Re: 170 renovations 78'
« Reply #70 on: June 14, 2021, 10:06:44 PM »
Still messing around with the 21p, and motor height. But it’s running solid and not really worth fine tuning it much more.
 5 1/2” Setback hasn’t had any negative ride that I noticed.
Scuppers are almost completely under ( about 1/4” more)  and water just about stays in the well without plugs in.

My guess is an 18” pitch will allow the engine to reach top end spec rpm same as mine, but even if you’re somewhere btwn 5000-5500 rpm, the mph will remain same....maybe +1 mph at best.  So what I’m saying is if you reach 5200-5300 then you’re pitch is dialed in...I wouldn’t drop another inch pitch for +200 rpms cause you won’t get more mph.
---------------
Jason
1976 AS 170
1998 S115TLRW

June 14, 2021, 10:26:45 PM
Reply #71

Mwar410

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Re: 170 renovations 78'
« Reply #71 on: June 14, 2021, 10:26:45 PM »
Before I dropped the motor an inch, I was turning almost 5400. Hard to be sure when exactly it blew out with trim going 43mph. Now it’s turning 4800, I’ll bring it up a 1/2” and call it good. Don’t need to be running wot anyway, cruising 32mph @4000rpm is plenty. The pup thinks 25 at 3200 is just fine.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

August 02, 2021, 07:39:22 AM
Reply #72

Mwar410

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Re: 170 renovations 78'
« Reply #72 on: August 02, 2021, 07:39:22 AM »


Been too busy for much of anything, but managed to almost finish putting the foam decking down.
1978 "170" 91' Yamaha 90hp
1973 “196” (just getting started)
Mike

August 02, 2021, 07:56:34 AM
Reply #73

RickK

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Re: 170 renovations 78'
« Reply #73 on: August 02, 2021, 07:56:34 AM »
Great picture.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

August 02, 2021, 01:09:24 PM
Reply #74

BradC

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Re: 170 renovations 78'
« Reply #74 on: August 02, 2021, 01:09:24 PM »

Been too busy for much of anything, but managed to almost finish putting the foam decking down.

How are you doing with the foam decking … working out as expected/hoped? Considering doing the same as part of my rebuild but have seen drastically opposed feedback. Tx

 

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