Yamaha 200HP (99 model EFI OX 66) trouble

[ktauber]

I have a Skeeter with a 1999 Yamaha 200 hp OX 66 EFI engine. Recently it wouldn't start. I took it to a dealer in town and we problem diagnosed it as follows. We checked the key switch it was ok. We then checked the wire harness it was not ok so we repleced the wiring harness. The problem still existed only now I got power to the gauges and to the electric fuel pump. However the started does not do anything. We put a battery right up to the started and the starter fired up. So the dealer thought it was the relay switch. We replaced it with a new one and that did not fix the problem. We then took the Solenoid for the starter out and replaced it still did not fix it. The relay switch just clicks when we turn the key. If anyone knows what could be the problem I would appreciate a reply.<br /><br />Thanks. I also have a similar issue with an older Procraft. Kinda weird that this happened to both at the same time.<br /><br />Thanks. keithtauber@hotmail.com

 

[Wahoo21]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

Keith,<br />I had a similar problem with my 130 Yamaha<br />with similar symptoms. Checked everything<br />and was about to buy like $300 in relays and soleniods, etc. and by chance happened to bounce the main battery cables to the engine<br />and had intermitant things work. Ended up only being a short/bad spot in the battery cable. Cut it out and shortened the cable some and everything works better, that draws<br />any kind of amperage. Hope it's that easy for you. I restore old GTO's too, and 9 out of 10 times if you have an electrical problem in a 12 volt system, it's a bad ground, or something has grounded that is not supposed to. Good luck

 

[omctech]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

Wahoo is dead on!!! Also, have your battery load tested to verify that the short hasn't damaged it.

 

[Overdraft]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

Just in case others out there are searching the history for help...<br /><br />I thought I had starter problems as well. The first signs of trouble was the starter spinned, but the "bendix" wouldn't "pop-up". Switched batteries, and voila, it worked - an hour later we were on the water. <br /><br />The next time to take it out, 2 months later, same problem! Except the more I tried it, the starter wouldn't turn over at all. Switched batteries (both I knew were fully charged!), still nothing. I thought it was the starter, so I took it off, and brought it to an expensive shop to test it. They bumped it with a battery, and viola, the bendix popped up - nothing wrong with the starter! I thought then I had a bad solenoid, or something else... <br /><br />I talked to a knowledgable, local boat mechanic, and he suggested I "tighten the wingnuts on the battery." Would you believe that's all it took?? I tightened the wingnuts probably a half a turn with pliers, and she started right up! <br /><br />Jeez... live and learn (every outing!)<br /><br />Mike, Eagle Point, Tx

 

[jim dozier]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

I just want to second what Overdraft said. Every time I have disconnected my boat battery for any kind of motor maintenance, my engine won't turn over after I reconnect the battery the first time. I usually have to clean the terminals and retighten the terminals. This has happened on the water once also. So check the simple stuff first.

 

[rodbolt]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

hello<br /> if you took it to a dealer and he just started plugging parts I would recommend a different dealer. any competent tech can find 12V dc problems with a simple muli-meter. just place the red lead on the positive battery cable at the solinoid and the black lead on the negative battery post and look for 12V under loaded conditions.<br /> If you have 12V then move the black lead to the block ground and retest. if you did not then move the red lead to the battery post and retest. this will eliminate the cables. sounds like you have a bad cable or connetion.<br /> good luck and keep posting.

 

[glenbudden]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

had same problem with 89 200hp yamaha. No matter how tight I did the wingnuts up on the battery it did not help. Ended up putting new terminal connectors on and solved problem straight away.

 

[willxuout2]

Re: Yamaha 200HP (99 model EFI OX 66) trouble

Hey guys, some of you are still using the "wingnuts" on your batteries? tisk tisk tisk....Alot of eletrical shorts and problems can be avoided if you replace those worthless wingnuts with a couple of stainless washers and nuts and tighten them down with a wrench.<br /><br />Good Luck.