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View Full Version : Wanted, Tacho and Prop

Nasher
02-12-2004, 03:08 PM
Looking for a Tacho and Prop for my Johnson 150VRO.

Current prop is too small at 15 x 17

giving me 38 knots at WOT on 6.25m Boat.

Nasher
Nasher
03-12-2004, 02:43 PM
Matt

Don't know any more about it other than whats on the web site.

Paid £10 for it about 20 years ago to a scrap metal dealer who didn't have the heart to scrap it.

Various Museums have asked me to donate it, but as it owes me so little I'll keep it.

One day I'll put an engine in it, and see how far I can get into Portsmouth harbour before I'm stopped

Nasher
Cookee
04-12-2004, 01:12 AM
What landing craft / website?
Nasher
04-12-2004, 04:33 AM
Anybody any idea what the assult crafts worth?

I'm, looking to swap the old Johnson for a 175 or 200HP E-tec next year, so will be scavenging for cash wherever I can.

Nasher
CB1
04-12-2004, 12:11 PM
Thats not a landing craft. Its a MESS TIN!!
Nasher
04-12-2004, 02:20 PM
Who you calling "Tin"?
Nasher
10-12-2004, 01:54 PM
C'mon guys, I'm looking for a Tacho that will work with my old Johnson 150HP VRO V6 2-stroke.

When I know the revs I'll be looking for a new prop no doubt.

Don't really care what it is as long as it works, although I'd rather a larger format rather than the small 52mm jobs.

Don't want to spend too much as I'm trying to make the most of the old engine for about a year, after which I'm splashing out on a 200HP E-TECH.

Thanks

Nasher.
Captain Chaos
10-12-2004, 02:28 PM
out of intrest, what boats it on?
Nasher
10-12-2004, 02:45 PM
Its on a 6.25M Ocean RIB.

Current prop is a 15x17 and is giving me only about 38 Knots with two adults on board.

I'm convinced its under propped, but without knowing the revs I can't be sure.

Nice engine, sounds a bit to Busy for my liking at WOT which probably means its over revving because of the small prop.

I'm going to change it late next year to increase my range, as currently I can't carry enough fuel to make it down to the Channel Islands.

Also, if the boats built for 200HP why not put 200HP on it. Just can't afford it at the moment.

Nasher.
Burty
10-12-2004, 05:38 PM
i'm sure my rev counter will work check out parts for sale:D
jw.
11-12-2004, 04:41 AM
Nasher, there was a crew who used to import ex Gulf war Johnson VRO motors. I think they were at Hayling Island but I can't remember their name. They also sold Ballistic ribs. A E T Marine has jsut come to mind but that might be completely wrong. Anyway, they may have what you need. You should be able to find a new tacho for 50-60ish kwid.
CB1
11-12-2004, 12:39 PM
It was AET marine. One of the guys running it was called Steve, realy helpfull bloke. He started off working for Paul Lemmer at bwm.
Tony Davis
12-12-2004, 02:35 AM
Merc Tacho £30.00 incl postage
Tony Davis
12-12-2004, 02:36 AM
Rear of
Nasher
12-12-2004, 09:39 AM
Tony

I've been warned that the quicksilver gauges are configured for 4-strokes only.

If I connect the signal terminal to one of the coil feeds will it not multiply that up by 2, ie 1 rev in 2 is ignition, rather than ignition on each rev like a 2-stroke, the result being it'll show twice the revs.

Unless of course the Merc 4-strokes work on the wasted spark system similar to Jap Bikes?

God I don't know! HELP

Nasher.
Jon Fuller
12-12-2004, 09:59 AM
OB's usually take their signal from the 12 pole alternator.
Tony Davis
12-12-2004, 11:22 AM
Originally posted by Nasher

I've been warned that the quicksilver gauges are configured for 4-strokes only.

Nasher.

Have you been talking to Manos?:D

According to the Mercury Parts Book, "The Merc Tacho 79-816833 is for all electric start outboards equiped with either a 4,6,8 or 12 pole alternator, as well as sterndrives and outboards".

Why don't you PM your address, and you can try it first if your unsure!
Nasher
12-12-2004, 11:50 AM
Tony

PM'd you, I'll buy it anyway and figure out where to take the signal from.

Manos is not to blame by the way.

Nasher.
Jon Fuller
12-12-2004, 12:05 PM
Originally posted by Nasher
Manos is not to blame by the way.

Nasher.

Manos is to blame for everything! :bang: :lol:lol:
Captain Chaos
12-12-2004, 12:36 PM
Including me not building my boat yet!
Nasher
16-12-2004, 02:18 AM
Thanks guys for all your pm's and posts.

I'm now sorted with a Tacho, cheers Tony, and I've taken a chance on buying a Hustler prop, 14 1/4 X 21, from Streamline as everything has pointed to that size being right for the boat/engine combination. 105 Quid appeared to be a good deal too.

Nasher