Reply
 
Thread Tools Search this Thread
 
Old 22 September 2018, 04:59   #1
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
My New 15 HP

Before I could get round to testing to see how well my 9.8 Tohatsu 2 stroke (27KG weight) would plane my new Honwave T38IE another of the Holy Grail of engines became available only 20 miles from me (which in its self is a miracle) So I decided to add to my equipment this 15HP 2 Stroke Mercury (34KG) which I am certain will plane the T38ie well.

It is ok to lift and carry a short distance.

I got it for what I consider a good price and it seems to run well and pump water fine. Real test will of course be on the water.

The tick over is a little fast but I can sort that and it backfires a couple of times when first started but that soon settles down. My 60 hp on my rib does the same

Heres hoping it will be a good purchase. Short video of it running



Dennis
Attached Thumbnails
Click image for larger version

Name:	IMG_3067.JPG
Views:	92
Size:	147.8 KB
ID:	126995   Click image for larger version

Name:	IMG_3074.JPG
Views:	98
Size:	205.7 KB
ID:	126996   Click image for larger version

Name:	IMG_3075.JPG
Views:	104
Size:	167.2 KB
ID:	126997  
__________________

__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 05:27   #2
Member
 
Country: UK - England
Town: East Anglia
Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Yamaha 15Hp 2-stroke
Join Date: Nov 2007
Posts: 5,065
BP a desirable motor and looks genuine condition. I've owned three so know them well.

If it pumps water like that at a normal speed idle looks like the thermostat has been removed because their proper tell-tale behaviour at idle is to have an erratic stream showing the stat is working.

None of them backfired at all... they were very even tempered for a 2-stroke. So I'd be thinking of a routine look over with new plugs, check leads, check timing, set idle to correct speed, set mixture and check it has a stat.

But these are minor things for a new to you OB... they so often need checking through even if from a dealer.

Look forward to hearing how it goes on the T38.
__________________

__________________
Fenlander is offline   Reply With Quote
Old 22 September 2018, 05:31   #3
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by Fenlander View Post
BP a desirable motor and looks genuine condition. I've owned three so know them well.

If it pumps water like that at a normal speed idle looks like the thermostat has been removed because their proper tell-tale behaviour at idle is to have an erratic stream showing the stat is working.

None of them backfired at all... they were very even tempered for a 2-stroke. So I'd be thinking of a routine look over with new plugs, check leads, check timing, set idle to correct speed, set mixture and check it has a stat.

But these are minor things for a new to you OB... they so often need checking through even if from a dealer.

Look forward to hearing how it goes on the T38.
Backfire was only 3 - 4 times after start. I will test it first before I start pulling it about. I am a great believer in if it aint broke don't fix it
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 05:32   #4
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
I assume it is 50:1 Mix Petrol.


I was also running it on quite old fuel to be honest
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 05:45   #5
Member
 
Country: UK - England
Town: East Anglia
Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Yamaha 15Hp 2-stroke
Join Date: Nov 2007
Posts: 5,065
Double check but all mine were 100:1 with handbook advice to run on 50:1 for commercial use. I ran mine around 75:1 to 80:1 as the best balance. They had 100:1 stickers on them.

Yep get fresh fuel for your outing before you judge it fully.
__________________
Fenlander is offline   Reply With Quote
Old 22 September 2018, 05:55   #6
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Tested it in my make shift tank to shift into forward and reverse. All seemed to work ok but I have to urn it slightly to reverse and then back a bit again to shift into Neautral. Cant see a sticker on it re the fuel mix. Lost in the mists of time I suspect. Once warm it starts a dream (half a pull) with no backfiring.


I agree the tell tale is rather fast I will check if it has a thermostat.


Smoke a bit but then I find that with all 2 strokes in a test tank


Dennis
Attached Thumbnails
Click image for larger version

Name:	Bath.jpg
Views:	71
Size:	195.9 KB
ID:	126999  
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 06:12   #7
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Found what I am pretty certain is the instruction manual for this engine


http://www.baads.org/wp-cms/wp-conte...nual_PART1.pdf


On Page 1A-3 It says 50:1 mix assuming this is the correct manual


Dennis
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 06:34   #8
Member
 
Country: UK - Scotland
Make: Destroyer 5.5/Ring18
Length: 3m +
Engine: Yam 90HP/Yam200HP
Join Date: Jul 2009
Posts: 690
Plumb I have the same engine, I will check what mine says on it for you later today
__________________
69cmw is offline   Reply With Quote
Old 22 September 2018, 07:09   #9
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by 69cmw View Post
Plumb I have the same engine, I will check what mine says on it for you later today
That will be very useful thanks.

Dennis
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 07:09   #10
Member
 
Country: UK - England
Town: East Anglia
Boat name: Nimrod II
Make: Aerotec 380
Length: 3m +
Engine: Yamaha 15Hp 2-stroke
Join Date: Nov 2007
Posts: 5,065
>>> pretty certain is the instruction manual for this engine

You can't go wrong re keeping the oiling up to scratch with 50:1 when not sure but where approved for 100:1 I found they trolled for periods better nearer 75:1 and of course less smoke.

It did depend on year with the later ones being 100:1. If you download a 1997 manual it refers to 100:1. The manual you have linked to is for 1986-on models.

So to be sure if interested in running a little less oil you need to know the age of yours.
__________________
Fenlander is offline   Reply With Quote
Old 22 September 2018, 07:18   #11
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by Fenlander View Post
>>> pretty certain is the instruction manual for this engine

You can't go wrong re keeping the oiling up to scratch with 50:1 when not sure but where approved for 100:1 I found they trolled for periods better nearer 75:1 and of course less smoke.

It did depend on year with the later ones being 100:1. If you download a 1997 manual it refers to 100:1. The manual you have linked to is for 1986-on models.

So to be sure if interested in running a little less oil you need to know the age of yours.
Very interesting I cant seem to see the age I will have to do more research.The guy I bought it off said 100:1
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 07:24   #12
Member
 
Country: UK - Scotland
Make: Destroyer 5.5/Ring18
Length: 3m +
Engine: Yam 90HP/Yam200HP
Join Date: Jul 2009
Posts: 690
Click image for larger version

Name:	IMG_1134.jpg
Views:	88
Size:	156.4 KB
ID:	127000

Thatís out of the instruction manual I got with mine
__________________
69cmw is offline   Reply With Quote
Old 22 September 2018, 07:35   #13
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by 69cmw View Post
Attachment 127000

Thatís out of the instruction manual I got with mine
Many thanks. Now I have a dilemma. Need to find out what year mine is and I cant seem to locate the seriel number at the moment
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 07:44   #14
Member
 
Country: UK - Scotland
Make: Destroyer 5.5/Ring18
Length: 3m +
Engine: Yam 90HP/Yam200HP
Join Date: Jul 2009
Posts: 690
Mine has the same decals as yours and I think itís around 1998
__________________
69cmw is offline   Reply With Quote
Old 22 September 2018, 08:03   #15
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by 69cmw View Post
Mine has the same decals as yours and I think itís around 1998
I am starting to think that mine is indeed post 1997 because of several things I am finding.

If it is not too much hassle could you please post a pic of your seriel number location/plate as I cant seem to track mine down.

Thnaks
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 10:00   #16
Member
 
Country: UK - Scotland
Make: Destroyer 5.5/Ring18
Length: 3m +
Engine: Yam 90HP/Yam200HP
Join Date: Jul 2009
Posts: 690
Quote:
Originally Posted by Bigplumbs View Post
If it is not too much hassle could you please post a pic of your seriel number location/plate as I cant seem to track mine down.

Thnaks

Iím not home, but itís a small silver sticker below the bottom engine tray next to where the silver gear linkage is.
__________________
69cmw is offline   Reply With Quote
Old 22 September 2018, 10:20   #17
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Quote:
Originally Posted by 69cmw View Post
Iím not home, but itís a small silver sticker below the bottom engine tray next to where the silver gear linkage is.
Thanks

Mine is missing... never mind
__________________
Bigplumbs is offline   Reply With Quote
Old 22 September 2018, 12:39   #18
Member
 
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 3,010
Like Fen' I run mine 75:1. Book always says 50:1 private, 100:1 commercial IIRC.

The gear behaviour you describe is the same as mine...

Merc/Mariner 15 two stroke neutral in/out gear adjustment?

...as is the tell tale, on tickover it will cut in and out but mostly out - on anything else, ie a fast idle or more it should be on all the time but never shoots out a huge jet like other 2 strokes I have used.

All in all though (and I'm always going on about it!) easily the best small 2 stroke made IMHO - super light for a 15 and the tilt/trim system and tiller gear change is something I would really miss on any other engine. I've had Tohatsu 9.8's and Yam and all had issues - unlike everyone else the 9.8 was a real PITA for us.

This was the link I always used for the full workshop manual but seems down:

http://boatinfo.no/lib/mercury/manua...0-15.html#/242
__________________
Max... is offline   Reply With Quote
Old 22 September 2018, 12:52   #19
Member
 
Country: UK - England
Town: Ipswich
Boat name: Click and Collect
Make: Valiant and Narwhal
Length: 4m +
Engine: Outboard
Join Date: Sep 2016
Posts: 1,107
Max. I have been messing around with it today and I am quite impressed. Just need the weather to imprive a bit so I can get it out on the water.


Dennis
__________________

__________________
Bigplumbs is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:12.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×