Yamaha 200hp Saltwater Series 2-stroke?

[rat_catcher]

I am considering purchasing a boat with a 200 year model 200hp Yamaha Saltwater Series 2-stroke engine. It has done about 350 hours and looks in excellent condition.

Anybody got any data on this engine?

Fuel usage? It is on a Signature 702SB.

Anything to look out for?

I have attached a few pics to have a look at. Any comments?

[Brumby]

Ha, answered my own question (in the sensabrake thread). PM me your e-mail address and I'll send you some info I dug up on fuel consumption etc for a similar size boat. Reason I went into it is I'm keen to upgrade from my early '90s Evinrude and my mechanic recommended a Yamaha 200. Reckons they are one of the tougher ones around. I have heard though that you need to be a bit fussy about the oil you use as mixing brands and or leaving it in place for a long time can lead to gel forming in the oil injection nozzles, doing the engine a power of no good. BM would be the right person to ask on the forum.

Sounds like a nice outfit you're looking at.

Cheers

Carl

[snelly1971]

Mine used approx 35 l/h on a 6 meter plate boat at 4200...WOT they are about 75-80 liters an hour....

Before you buy it ...get it checked out by a mechanic...they were prone to drop bearings sometimes....Mine had done 2000 hrs before it dropped a bearing...which destroyed the motor....

Cheers Mick

[Wayne_Red]

I used to have a mid 80's 200yam. I got @ 90litres for 100km cruising on 4k on a 6m seafarer. Can't comment on the later models though.

Can't quite make out the ID plate but to the right of "yamaha motor co ltd" if it is a 2000 model it should have the letter T. If it is a 99' model it will have the letter U. Never hurts to check.
Regards Wayne

[leezor]

I had a 96 model 200 Yammy previously on my SF20, at around 4200 RPM the best I could do was just over 1km per litre at just over 40 l/ph from memory. I imagine pushing a 702SB the fuel consumption would be higher than this though.

[BM]

Most big V6's chew about 90ltrs per hour at full noise (or WOT to be trendy).

At 80% throttle (cruise throttle) the fuel economy will be remarkably different and the boat speed will not be too far from full noise.

In any oil injection system its best not to mix oils due ot the potential of gelling. Likewise old oil has a habit of gelling too. Easiest idea is to tip out the oil bottle contents and replace the oil bottle filter screen (if fitted).

Being a 7mtr boat with 200hp its going to be up there in throtle to achieve reasonable performance. I had a boat in my yard (when I had my boatyard) a Formula 233 with a 7.4ltr MerCruiser (big block Chev) 330hp and it went alright but not fantastic. Fished from it a few times. Wasn't bad on the juice. If it was only 200hp it would have been a pig. Granted though, they are different boats.

I reckon the boat you are looking at would be much better powered (and certainly not overpowered) by a pair of 150's.

Cheers

[ozscott]

I used to think that 115 on my Vagabond would be underpowered until I took her for a trial. 70kph from the Yammy. Now I have added a lot of weight and with a few boofs in her she still does 65kph and cruises at 45 - 6.4 LOA. 800KG bear hull and I have added heaps. 21 degrees rise front to back.

[Brumby]

BM I wouldn't write off the 200 too quickly, by way of comparison, I've got a 175 on my old Mustang (7.3m with straight deep V, no variable deadrise) and since I had the hull cleaned, I cruise at 24kts/4200rpm and top out over 35kts. I would think that you'll do a bit better with a 702/200 combination. I haven't looked up the specs on the Haines website, but I think that 300hp may be over the limit.

Cheers

Carl

[BM]

I would expect the Haines to be a tad heavier in construction than you 'Stang.

The speeds you are quoting for your rig, are you sure they are KNOTS? and not MILES?

Cheers

[Brumby]

I would expect the Haines to be a tad heavier in construction than you 'Stang.

The speeds you are quoting for your rig, are you sure they are KNOTS? and not MILES?

Cheers

Yeah, double checked the GPS after the boat came out of the yard - the jump was that dramatic after having the crud cleaned off the bottom, I thought someone had reset it for me.

[rat_catcher]

Can't quite make out the ID plate but to the right of "yamaha motor co ltd" if it is a 2000 model it should have the letter T. If it is a 99' model it will have the letter U.

This one has the letter 'U' so I guess it is actually a 1999 model. Does that make a significant difference?

I have attached a closer shot of the engine label.

[rat_catcher]

I reckon the boat you are looking at would be much better powered (and certainly not overpowered) by a pair of 150's.

Signature rates the max power at a single 250hp or twin x 115hp.

With 200hp being 80% of max, I wasn't seeing that as underpowered.

I have also tested a 702L with a 250hp Suzuki and the 200hp Yamaha has a better power to weight ratio than the 250hp Suzuki.

Thoughts?

[predator]

this web site will tell you what it is...

http://www.marinshopen.se/

[wessel]

If you can speak Swedish it would seem.....

[Wayne_Red]

[QUOTE][This one has the letter 'U' so I guess it is actually a 1999 model. Does that make a significant difference?
/QUOTE]
Hi rat catcher. Doesn't make a significant difference, just good to know what you are buying. Might be able to talk a few dollars off. Your motor looks in great nic.
A mate once bought a second hand motor off a local dealer believing it was 2 years old. Found out a few years later it was 5 years older than he was told, so I alway check.
Regards Wayne